CN105448093A - Intersection V/C ratio acquiring method and system - Google Patents
Intersection V/C ratio acquiring method and system Download PDFInfo
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- CN105448093A CN105448093A CN201510997338.3A CN201510997338A CN105448093A CN 105448093 A CN105448093 A CN 105448093A CN 201510997338 A CN201510997338 A CN 201510997338A CN 105448093 A CN105448093 A CN 105448093A
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/01—Detecting movement of traffic to be counted or controlled
- G08G1/0104—Measuring and analyzing of parameters relative to traffic conditions
- G08G1/0125—Traffic data processing
- G08G1/0133—Traffic data processing for classifying traffic situation
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Abstract
The invention provides an intersection key V/C ratio-based key route selection method. According to the method, the V/C ratio of each lane group, the possible routes of phases, the the V/C ratios of the routes, the V/C ratios of the key routes of the phases, and the sum of lost time of the key routes are comprehensively considered, and based on the above factors, the key V/C ratio of an intersection is calculated, and therefore, a more reasonable and accurate intersection key V/C ratio can be obtained; based on the intersection key V/C ratio which is obtained through calculation, and by means of the V/C ratios of the lane groups in the same phase and the V/C ratios of lane groups appearing in a plurality of lanes, and sorting and corresponding processing are performed according to the playing sequence of the phases, and therefore, proper key routes can be selected out; and based on the lost time, the v/s ratios of all key lane groups and the v/s ratios of all key routes, the key v/c ratio of the intersection can be obtained. With the method adopted, support can be provided for scientificity, reasonability and timeliness of traffic decision making.
Description
Technical field
The present invention relates to intelligent transportation field, in particular to a kind of crossing V/C than acquisition methods and system.
Background technology
Along with the development of economic society, the high accident rate that motorize brings force people to drop into research that a large amount of manpower and materials carry out traffic safety, is wherein especially subject to concern and the attention of people to the analysis of accident and prevention.The relation of lot of domestic and international researcher to the volume of traffic and traffic hazard has carried out a large amount of analysis and research, and returns accidents happened model.The volume of traffic is independent of one of road itself absolute numerical value, and the ratio V/C of the volume of traffic and the traffic capacity of respective stretch is than being the relative quantity of reacting the road degree of crowding, it more can react the traffic of road than the volume of traffic, also more close with the relation of traffic hazard.The relation of V/C and traffic hazard can not only provide an index for the prevention of traffic hazard, but also can as a reference of the safety evaluation of the evaluation of road travel state, highway, planning of highways, reorganization and expansion.
Although external existing numerous researcher is studied than the relation between accident rate V/C, and propose similar relation curve, but mostly bases of these researchs are to be accustomed to based on the posture of external environment, driver, the calculating etc. of accident statistics method and the traffic capacity, and these differences are larger with the relationship affect of accident rate to V/C ratio.At present, we there is not yet and adapt to V/C under existing domestic communication environment than research with to calculate correlation technique open.
Summary of the invention
A first aspect of the present invention proposes a kind of crossing V/C than acquisition methods, comprises the following steps:
Step 1, Protocol Numbers when to obtain update time table from phase place crossing cycle length and cycle duration C, method is: in table, all start times are less than in update time, get the Current protocols numbering PLAN_ID of up-to-date data, Current protocols refers to current intersection signal timing scheme;
Step 2, with SCATS phase-group ID=track ID, from phase-group and SCATS scheme relation table, obtain current phase-group number;
Step 3, with phase-group numbering obtain all phase bit numbers from phase meter;
Step 4, from the group table of track, get the track group that phase place comprises, the lane number that track group comprises;
Step 5, calculate the v/s ratio of each track group respectively, for the track group occurred in two continuous print phase places, only calculate a v/s ratio;
Add up the track number N that each track group comprises
i, the saturation volume rate s in initialization track
0=1800/h;
Then, the saturation volume rate s of track group i
i=N
i* s
0, unit is :/h;
Step 6, obtain the track flow of first 10 minutes of update time from che track flowmeter, by got 10 flows summations, obtain q
i, then calculate the actual flow v in each track
j=q
j× 6;
Then, the actual flow rate v of track group i
i=∑ v
j, unit is :/h;
The v/s ratio of step 7, calculating track group i is: v
i/ s
i;
Step 8, judged whether to open late early disconnected phase place, method is: if there is track group to occur in the two or more phase place of continuous print, and its lane number is identical, then exist and open early disconnected phase place late, go to step 11; If any one track group does not repeat in continuous print two phase places, except evergreen phase place, then do not open early disconnected phase place in this phasing scheme late; Go to step 9;
Step 9, for the track group belonging to same phase bit number, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of phase place
Step 10, in this programme numbering the crucial track group v/s of all phase bit numbers than suing for peace, namely
each phase bit number give one lost time t=3s, then total in one-period L=phase place number * t lost time lost time, then the crucial v/c ratio at this crossing is:
c is cycle duration acquired in step 1;
Step 11, for the track group only existed in a phase place, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of this phase place;
Step 12, for the track group occurred in multiple phase place, each phase place is carried out sort ascending according to phase place playing sequence, by in the phase place play at first, the track group layout sequence number 1 that v/s is larger, the track group layout sequence number 2 that v/s is smaller, by in the phase place finally play, the track group layout sequence number 4 that the track group layout sequence number 3, v/s that v/s is larger is smaller;
Step 13, by the v/s of No. 1 track group and No. 4 track groups than suing for peace; By the v/s of No. 2 track groups and No. 3 track groups than suing for peace; The relatively v/s ratio of two routes, retains the circuit that v/s is larger, as the critical path of phase place;
Step 14, in an arrangement, counting loss time, the crucial track group number * t+ critical path number * 2t of L=lost time;
Step 15, this programme numbering in, calculate
then the crucial v/c ratio at this crossing is:
c is the cycle duration that step 1 obtains.
In further example, preceding method more comprises supersaturation and reports to the police, and specifically comprises:
As the crucial v/c>0.9 at crossing, make hypersaturated state S
t=1, judge front two moment hypersaturated state s
t-1, s
t-2value, if s
t-2=1 and s
t-1=1, system provides supersaturation and reports to the police;
As s
t-2=1 and s
t-1=0, or s
t-2=0 and s
t-1=1, or s
t-2=0, and s
t-1=0, or the key at crossing
During v/c<=0.9, then do not report to the police, return step 1.
As long as should be appreciated that aforementioned concepts and all combinations of extra design described in further detail below can be regarded as a part for subject matter of the present disclosure when such design is not conflicting.In addition, all combinations of theme required for protection are all regarded as a part for subject matter of the present disclosure.
The foregoing and other aspect of the present invention's instruction, embodiment and feature can be understood by reference to the accompanying drawings from the following description more all sidedly.Feature and/or the beneficial effect of other additional aspect of the present invention such as illustrative embodiments will be obvious in the following description, or by learning in the practice of the embodiment according to the present invention's instruction.
Accompanying drawing explanation
Accompanying drawing is not intended to draw in proportion.In the accompanying drawings, each identical or approximately uniform ingredient illustrated in each figure can represent with identical label.For clarity, in each figure, not each ingredient is all labeled.Now, the embodiment of various aspects of the present invention also will be described with reference to accompanying drawing by example, wherein:
Fig. 1 is according to the crossing V/C of the certain embodiments of the invention process flow diagram than acquisition methods.
Embodiment
In order to more understand technology contents of the present invention, institute's accompanying drawings is coordinated to be described as follows especially exemplified by specific embodiment.
Each side with reference to the accompanying drawings to describe the present invention in the disclosure, shown in the drawings of the embodiment of many explanations.Embodiment of the present disclosure must not be intended to comprise all aspects of the present invention.Be to be understood that, multiple design presented hereinbefore and embodiment, and describe in more detail below those design and embodiment can in many ways in any one is implemented, this is because design disclosed in this invention and embodiment are not limited to any embodiment.In addition, aspects more disclosed by the invention can be used alone, or otherwisely anyly appropriately combinedly to use with disclosed by the invention.
Shown in composition graphs 1, according to embodiments of the invention, a kind of crossing V/C, than acquisition methods, comprises the following steps:
Step 1, Protocol Numbers when to obtain update time table from phase place crossing cycle length and cycle duration C, method is: in table, all start times are less than in update time, get the Current protocols numbering PLAN_ID of up-to-date data, Current protocols refers to current intersection signal timing scheme;
Step 2, with SCATS phase-group ID=track ID, from phase-group and SCATS scheme relation table, obtain current phase-group number;
Step 3, with phase-group numbering obtain all phase bit numbers from phase meter;
Step 4, from the group table of track, get the track group that phase place comprises, the lane number that track group comprises;
Step 5, calculate the v/s ratio of each track group respectively, for the track group occurred in two continuous print phase places, only calculate a v/s ratio;
Add up the track number N that each track group comprises
i, the saturation volume rate s in initialization track
0=1800/h;
Then, the saturation volume rate s of track group i
i=N
i* s
0, unit is :/h;
Step 6, obtain the track flow of first 10 minutes of update time from che track flowmeter, by got 10 flows summations, obtain q
i, then calculate the actual flow v in each track
j=q
j× 6;
Then, the actual flow rate v of track group i
i=∑ v
j, unit is :/h;
The v/s ratio of step 7, calculating track group i is: v
i/ s
i;
Step 8, judged whether to open late early disconnected phase place, method is: if there is track group to occur in the two or more phase place of continuous print, and its lane number is identical, then exist and open early disconnected phase place late, go to step 11; If any one track group does not repeat in continuous print two phase places, except evergreen phase place, then do not open early disconnected phase place in this phasing scheme late; Go to step 9;
Step 9, for the track group belonging to same phase bit number, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of phase place
Step 10, in this programme numbering the crucial track group v/s of all phase bit numbers than suing for peace, namely
each phase bit number give one lost time t=3s, then total in one-period L=phase place number * t lost time lost time, then the crucial v/c ratio at this crossing is:
c is cycle duration acquired in step 1;
Step 11, for the track group only existed in a phase place, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of this phase place;
Step 12, for the track group occurred in multiple phase place, each phase place is carried out sort ascending according to phase place playing sequence, by in the phase place play at first, the track group layout sequence number 1 that v/s is larger, the track group layout sequence number 2 that v/s is smaller, by in the phase place finally play, the track group layout sequence number 4 that the track group layout sequence number 3, v/s that v/s is larger is smaller;
Step 13, by the v/s of No. 1 track group and No. 4 track groups than suing for peace; By the v/s of No. 2 track groups and No. 3 track groups than suing for peace; The relatively v/s ratio of two routes, retains the circuit that v/s is larger, as the critical path of phase place;
Step 14, in an arrangement, counting loss time, the crucial track group number * t+ critical path number * 2t of L=lost time;
Step 15, this programme numbering in, calculate
then the crucial v/c ratio of crossing is:
c is the cycle duration that step 1 obtains.
In further example, preceding method more comprises supersaturation and reports to the police, and specifically comprises:
As the crucial v/c>0.9 of crossing, make hypersaturated state S
t=1, judge front two moment hypersaturated state s
t-1, s
t-2value, if s
t-2=1 and s
t-1=1, system provides supersaturation and reports to the police;
As s
t-2=1 and s
t-1=0, or s
t-2=0 and s
t-1=1, or s
t-2=0, and s
t-1=0, or the key of crossing
During v/c<=0.9, then do not report to the police, return step 1.
From above technical scheme, step obtains the crucial V/C ratio in crossing thus, and the data needed for it accurately, in real time, the complexity of computation process is low, speed is fast, the timely acquisition of the crucial V/C ratio in crossing can be realized, and keep higher accuracy and real-time.Based on the crucial V/C ratio in the crossing obtained, consider the V/C ratio of the track group occurred in the V/C ratio of the track group in same phase place and multiple phase place, carry out sorting and respective handling with its playing sequence, thus select suitable critical path and determine the crucial V/C ratio of crossing, for traffic science decision-making provides support.
In aforementioned schemes, consider the V/C ratio of each track group, the potential route of phase place and the V/C ratio of route, the V/C ratio of the critical path of phase place, summation lost time of critical path, based on these because usually calculating the crucial V/C ratio at crossing, therefore obtain one more rationally, the crucial V/C ratio in crossing accurately, come reasonably to judge and process based on this, carry out the selection of critical path, on the basis selected, we determine the crucial V/C ratio of crossing, are beneficial to as the science of communications policy, rationality and promptness provide support.
In the aforementioned embodiment, we are based on resources such as electronic police data, digital road net data, and title, the type cases of the input data that can obtain will be described further below.
1) phase-group and SCATS scheme relation table MD_PHASE_GROUP_SCATS_REL
2) SCATS and crossing relation table MD_INTERSECTION_SCATS_REL
3) phase-group table MD_PHASE_GROUP
3) phase meter MD_PHASE
4) the track MD_LANES_OF_PHASE that comprises of phase place
5) track group MD_LANE_GROUP
6) phase place crossing Table A cycle length Y_RESULT_CROSS_CYCLE_TIME
| Crossing ID | Current protocols is numbered | Start time | Cycle length |
| CROSS_ID | PLAN_ID | BEGIN_TIME | CYCLE_TIME |
| varchar | NUMBER | LONG(13) | NUMBER |
This phase place crossing table cycle length obtains by reading SCATS signal timing dial system.
7) track flowmeter AY_RESULT_LANE_VOLUMN
In aforesaid step 1-15, step 1-4 is track group obtaining step, step 5-7 is that track group v/s compares calculation procedure, step 8-10 is for opening early disconnected phase place determining step late, determine the crucial v/c ratio at crossing, step 11-13 is that the critical path of phase place selects step, and step 14-15 is that crossing V/C compares calculation procedure.
According to improvement of the present invention, also propose a kind of computer system for determining crossing V/C ratio, this computer system comprises:
One or more processor;
Storer, is arranged for the program module and data that store and used by described one or more processor, and these program modules are configured to determine that crossing V/C compares in the following manner when being performed by one or more processor:
Step 1, Protocol Numbers when to obtain update time table from phase place crossing cycle length and cycle duration C, method is: in table, all start times are less than in update time, get the Current protocols numbering PLAN_ID of up-to-date data, Current protocols refers to current intersection signal timing scheme;
Step 2, with SCATS phase-group ID=track ID, from phase-group and SCATS scheme relation table, obtain current phase-group number;
Step 3, with phase-group numbering obtain all phase bit numbers from phase meter;
Step 4, from the group table of track, get the track group that phase place comprises, the lane number that track group comprises;
Step 5, calculate the v/s ratio of each track group respectively, for the track group occurred in two continuous print phase places, only calculate a v/s ratio;
Add up the track number N that each track group comprises
i, the saturation volume rate s in initialization track
0=1800/h;
Then, the saturation volume rate s of track group i
i=N
i* s
0, unit is :/h;
Step 6, obtain the track flow of first 10 minutes of update time from che track flowmeter, by got 10 flows summations, obtain q
i, then calculate the actual flow v in each track
j=q
j× 6;
Then, the actual flow rate v of track group i
i=∑ v
j, unit is :/h;
The v/s ratio of step 7, calculating track group i is: v
i/ s
i;
Step 8, judged whether to open late early disconnected phase place, method is: if there is track group to occur in the two or more phase place of continuous print, and its lane number is identical, then exist and open early disconnected phase place late, go to step 11; If any one track group does not repeat in continuous print two phase places, except evergreen phase place, then do not open early disconnected phase place in this phasing scheme late; Go to step 9;
Step 9, for the track group belonging to same phase bit number, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of phase place
Step 10, in this programme numbering the crucial track group v/s of all phase bit numbers than suing for peace, namely
each phase bit number give one lost time t=3s, then total in one-period L=phase place number * t lost time lost time, then the crucial v/c ratio at this crossing is:
c is cycle duration acquired in step 1;
Step 11, for the track group only existed in a phase place, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of this phase place;
Step 12, for the track group occurred in multiple phase place, each phase place is carried out sort ascending according to phase place playing sequence, by in the phase place play at first, the track group layout sequence number 1 that v/s is larger, the track group layout sequence number 2 that v/s is smaller, by in the phase place finally play, the track group layout sequence number 4 that the track group layout sequence number 3, v/s that v/s is larger is smaller;
Step 13, by the v/s of No. 1 track group and No. 4 track groups than suing for peace; By the v/s of No. 2 track groups and No. 3 track groups than suing for peace; The relatively v/s ratio of two routes, retains the circuit that v/s is larger, as the critical path of phase place;
Step 14, in an arrangement, counting loss time, the crucial track group number * t+ critical path number * 2t of L=lost time;
Step 15, this programme numbering in, calculate
then the crucial v/c ratio of this crossing is:
c is the cycle duration that step 1 obtains.
In some instances, also comprise the program module for realizing following process in the storer of this computer system, these program modules are configured to process in the following manner and realize supersaturation warning:
As the crucial v/c>0.9 of crossing, make hypersaturated state s
t=1, judge front two moment hypersaturated state s
t-1, s
t-2value, if s
t-2=1 and s
t-1=1, system provides supersaturation and reports to the police;
As s
t-2=1 and s
t-1=0, or s
t-2=0 and s
t-1=1, or s
t-2=0, and s
t-1=0, or the key of crossing
During v/c<=0.9, then do not report to the police, return step 1.
Although the present invention with preferred embodiment disclose as above, so itself and be not used to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on those as defined in claim.
Claims (4)
1. crossing V/C is than an acquisition methods, it is characterized in that, comprises the following steps:
Step 1, Protocol Numbers when to obtain update time table from phase place crossing cycle length and cycle duration C, method is: in table, all start times are less than in update time, get the Current protocols numbering PLAN_ID of up-to-date data, Current protocols refers to current intersection signal timing scheme;
Step 2, with SCATS phase-group ID=track ID, from phase-group and SCATS scheme relation table, obtain current phase-group number;
Step 3, with phase-group numbering obtain all phase bit numbers from phase meter;
Step 4, from the group table of track, get the track group that phase place comprises, the lane number that track group comprises;
Step 5, calculate the v/s ratio of each track group respectively, for the track group occurred in two continuous print phase places, only calculate a v/s ratio;
Add up the track number N that each track group comprises
i, the saturation volume rate s in initialization track
0=1800/h;
Then, the saturation volume rate s of track group i
i=N
i* s
o, unit is :/h;
Step 6, obtain the track flow of first 10 minutes of update time from che track flowmeter, by got 10 flows summations, obtain q
i, then calculate the actual flow v in each track
j=q
j× 6;
Then, the actual flow rate v of track group i
i=∑ v
j, unit is :/h;
The v/s ratio of step 7, calculating track group i is: v
i/ s
i;
Step 8, judged whether to open late early disconnected phase place, method is: if there is track group to occur in the two or more phase place of continuous print, and its lane number is identical, then exist and open early disconnected phase place late, go to step 11; If any one track group does not repeat in continuous print two phase places, except evergreen phase place, then do not open early disconnected phase place in this phasing scheme late; Go to step 9;
Step 9, for the track group belonging to same phase bit number, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of phase place
Step 10, in this programme numbering the crucial track group v/s of all phase bit numbers than suing for peace, namely
each phase bit number give one lost time t=3s, then total in one-period L=phase place number * t lost time lost time, then the crucial v/c ratio at this crossing is:
c is cycle duration acquired in step 1;
Step 11, for the track group only existed in a phase place, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of this phase place;
Step 12, for the track group occurred in multiple phase place, each phase place is carried out sort ascending according to phase place playing sequence, by in the phase place play at first, the track group layout sequence number 1 that v/s is larger, the track group layout sequence number 2 that v/s is smaller, by in the phase place finally play, the track group layout sequence number 4 that the track group layout sequence number 3, v/s that v/s is larger is smaller;
Step 13, by the v/s of No. 1 track group and No. 4 track groups than suing for peace; By the v/s of No. 2 track groups and No. 3 track groups than suing for peace; The relatively v/s ratio of two routes, retains the circuit that v/s is larger, as the critical path of phase place;
Step 14, in an arrangement, counting loss time, the crucial track group number * t+ critical path number * 2t of L=lost time;
Step 15, this programme numbering in, calculate
then the crucial v/c ratio of this crossing is:
c is the cycle duration that step 1 obtains.
2. crossing V/C according to claim 1 is than acquisition methods, it is characterized in that, the method comprises supersaturation alert process more, specifically comprises:
As the crucial v/c>0.9 of crossing, make hypersaturated state S
t=1, judge front two moment hypersaturated state s
t-1, s
t-2value, if s
t-2=1 and s
t-1=1, send supersaturation and report to the police;
As s
t-2=1 and s
t-1=0, or s
t-2=0 and s
t-1=1, or s
t-2=0, and s
t-1=0, or the key of crossing
During v/c<=0.9, then do not report to the police, return step 1.
3. for determining a computer system for crossing V/C ratio, it is characterized in that, this computer system comprises:
One or more processor;
Storer, is arranged for the program module and data that store and used by described one or more processor, and these program modules are configured to determine that crossing V/C compares in the following manner when being performed by one or more processor:
Step 1, Protocol Numbers when to obtain update time table from phase place crossing cycle length and cycle duration C, method is: in table, all start times are less than in update time, get the Current protocols numbering PLAN_ID of up-to-date data, Current protocols refers to current intersection signal timing scheme;
Step 2, with SCATS phase-group ID=track ID, from phase-group and SCATS scheme relation table, obtain current phase-group number;
Step 3, with phase-group numbering obtain all phase bit numbers from phase meter;
Step 4, from the group table of track, get the track group that phase place comprises, the lane number that track group comprises;
Step 5, calculate the v/s ratio of each track group respectively, for the track group occurred in two continuous print phase places, only calculate a v/s ratio;
Add up the track number N that each track group comprises
i, the saturation volume rate s in initialization track
o=1800/h;
Then, the saturation volume rate s of track group i
i=N
i* s
o, unit is :/h;
Step 6, obtain the track flow of first 10 minutes of update time from che track flowmeter, by got 10 flows summations, obtain q
i, then calculate the actual flow v in each track
j=q
j× 6;
Then, the actual flow rate v of track group i
i=∑ v
j, unit is :/h;
The v/s ratio of step 7, calculating track group i is: v
i/ s
i;
Step 8, judged whether to open late early disconnected phase place, method is: if there is track group to occur in the two or more phase place of continuous print, and its lane number is identical, then exist and open early disconnected phase place late, go to step 11; If any one track group does not repeat in continuous print two phase places, except evergreen phase place, then do not open early disconnected phase place in this phasing scheme late; Go to step 9;
Step 9, for the track group belonging to same phase bit number, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of phase place
Step 10, in this programme numbering the crucial track group v/s of all phase bit numbers than suing for peace, namely
each phase bit number give one lost time t=3s, then total in one-period L=phase place number * t lost time lost time, then the crucial v/c ratio at this crossing is:
c is cycle duration acquired in step 1;
Step 11, for the track group only existed in a phase place, the v/s ratio of contrast track group, retains v/s larger, as the crucial track group of this phase place;
Step 12, for the track group occurred in multiple phase place, each phase place is carried out sort ascending according to phase place playing sequence, by in the phase place play at first, the track group layout sequence number 1 that v/s is larger, the track group layout sequence number 2 that v/s is smaller, by in the phase place finally play, the track group layout sequence number 4 that the track group layout sequence number 3, v/s that v/s is larger is smaller;
Step 13, by the v/s of No. 1 track group and No. 4 track groups than suing for peace; By the v/s of No. 2 track groups and No. 3 track groups than suing for peace; The relatively v/s ratio of two routes, retains the circuit that v/s is larger, as the critical path of phase place;
Step 14, in an arrangement, counting loss time, the crucial track group number * t+ critical path number * 2t of L=lost time;
Step 15, this programme numbering in, calculate
then the crucial v/c ratio of this crossing is:
c is the cycle duration that step 1 obtains.
4. the computer system for determining crossing V/C ratio according to claim 1, it is characterized in that, also comprise the program module for realizing following process in the storer of this computer system, these program modules are configured to process in the following manner and realize supersaturation warning:
As the crucial v/c>0.9 of crossing, make hypersaturated state S
t=1, judge front two moment hypersaturated state s
t-1, s
t-2value, if s
t-2=1 and s
t-1=1, system provides supersaturation and reports to the police;
As s
t-2=1 and s
t-1=0, or s
t-2=0 and s
t-1=1, or s
t-2=0, and s
t-1=0, or the key of crossing
During v/c<=0.9, then do not report to the police, return step 1.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510997338.3A CN105448093B (en) | 2015-12-28 | 2015-12-28 | A kind of intersection V/C is than acquisition methods and system |
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|---|---|---|---|
| CN201510997338.3A CN105448093B (en) | 2015-12-28 | 2015-12-28 | A kind of intersection V/C is than acquisition methods and system |
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| Publication Number | Publication Date |
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| CN105448093A true CN105448093A (en) | 2016-03-30 |
| CN105448093B CN105448093B (en) | 2018-04-20 |
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| CN201510997338.3A Active CN105448093B (en) | 2015-12-28 | 2015-12-28 | A kind of intersection V/C is than acquisition methods and system |
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