CN103208082B - The evaluation of a kind of downtown area road utilization ratio and application process - Google Patents

Abstract

The invention discloses a kind of method assessing downtown area road utilization ratio based on road section centerline length and path area, concretely comprise the following steps: first obtain each center, city Vector Topographic Map data, and on the basis of Spot Test, it checked and adjust；Then by AUTOCAD computed in software, each achievement data is obtained；The data input assessment models that will obtain, obtains downtown area road utilization ratio index, on this basis, with AUTOCAD software as work platforms, promotes center road utilization ratio by constantly adjusting to evaluate.The present invention, based on the data accurately, preferably measured, is adjusted by direct visual means, promotes downtown area road utilization ratio.

Description

The evaluation of a kind of downtown area road utilization ratio and application process

Technical field

The present invention relates to one and assess downtown area road based on road section centerline length and path area The method of utilization ratio, belongs to urban planning technical field.

Background technology

1. the most less to the quantitative study of road utilization ratio, and the many fingers of road utilization ratio being commonly referred Efficiency is passed through in traffic, as follows:

1. German scholar Wemer Brilon is combined in one the operation of traffic flow with the external force acting in physics Rising, the traffic efficiency proposing certain burst of traffic flow is represented by:

$E_i=q_i{T}_i{v}_{T_i}$

In formula, E_iIt it is the traffic efficiency of i-th burst of traffic flow；q_iIt it is the average arrival rate of i-th burst of traffic flow；T_i For analyzing the length of period；v_TiI-th strand of traffic flow average running speed.

2. LatoraV etc. are when studying small-world network, it is proposed that a kind of efficiency evaluation method of weighted network, Its computational methods are as follows:

$E=E\left(G\right)=\frac{1}{n(n-1)}\underset{i\≠j\∈G}{\mathrm{\Σ}}\frac{1}{d_{\mathrm{ij}}}$

In formula: d_ijRepresent the shortest path length of nodes i to node j, if without path between i to j Connection, then d_ij=+∞。

3. the method for significance of highway segment, the method during Jenelius E etc. it is also proposed an assessment highway network It is the connectedness that whether can affect network of the deletion according to section, and uses different computing formula.For one Individual given network G, for section k ∈ G, this method gives 3 indexs assessing its importance degree: comprehensive Importance degree I₁, importance degree I with demand as weight₂, relative not met rate I₃, it is respectively calculated as follows

$I_3\left(k\right)=\frac{1}{\underset{(r,s)\∈W}{\mathrm{\Σ}}{q}_{\mathrm{rs}}}\underset{(r,s)\∈W}{\mathrm{\Σ}}{u}_{\mathrm{rs}}(G-k)$

2., beyond traffic efficiency, also research and propose the different understanding to road efficiency:

1. section traffic efficiency: this index is complete within this time period by the vehicle of section in referring to the unit interval The truck kilometer number become, its service level having considered section and service traffic volume, it is defined as:

E_s=qυT

In formula: T is the unit time, generally takes 1h.

2. section transfer efficiency: section transfer efficiency refers to the accumulation on section of the section traffic efficiency, and this refers to Mark has considered the service level in section and the transport need of service, and it is defined as:

E_L=qL υ

Definition n is the section vehicle number at moment t, according to q=kv, n=kl, then has E_L=nv²

3. road network operational efficiency: road network operational efficiency refers to form the transfer efficiency sum in each bar section of road network, This index comprehensive considers the service level of road network and the transport need of service, and it is defined as:

$E_N=\underset{i=1}{\overset{N}{\mathrm{\Σ}}}{E}_{L_i}$

The different understanding of different road utilization ratios, the difference of often corresponding road utilization ratio define and Measuring method.And in the range of this specific region, center, road efficiency should be directly related with developing land used, Promote the raising of center whole economic efficiency.

Summary of the invention

For the deficiencies in the prior art, the present invention is directed to downtown area road the most spacious or narrow Current Situation, it is believed that the road utilization ratio in the range of this specific region, downtown area, should be more Consider its impact brought by periphery land-use development, to improve its benefit run, increase center advantage Land area can be managed in position, and then increases center economic benefit, and can form good downtown area The assessment feedback method of land utilization efficiency.

Owing to the assessment of downtown area road utilization ratio is usually present appraisal procedure complexity, data are difficult to obtain , and the problem lacking corresponding method of adjustment, it is desirable to provide it is a kind of based on objective rationality data, The assessment more simplified and hoisting way, and data be more easy to obtain, degree of accuracy is higher, to promote down town District's land utilization efficiency.

The present invention proposes one and assesses road, downtown area based on road section centerline length and path area The method of road utilization ratio, first obtains each center, city Vector Topographic Map data, and at Spot Test On the basis of it is checked and adjusts；Then by AUTOCAD computed in software, each achievement data is obtained； The data input assessment models that will obtain, obtains downtown area road utilization ratio index, on this basis, With AUTOCAD software as work platforms, by constantly adjusting-evaluate-lifting center road utilization ratio. Comprise the following steps:

Step 1: obtain downtown area existing Vector Topographic Map data.Wherein said existing vector landform Diagram data is by drawing after field survey by the professional and technical personnel of Mapping departments or planning department, generally may be used Buy through local Surveying And Mapping Institute, or by obtaining with the cooperation of local regional planning agency.

Step 2: center road conditions is carried out on-site inspection and measurement, and Vector Topographic Map is adjusted And supplement, obtain up-to-date Vector Topographic Map data.

Step 3: by AUTOCAD software, Vector Topographic Map data is carried out vector edition, calculate and obtain each road Section centerline length and Road width.

Step 4: build center road based on each road section centerline length obtained and Road width and utilize Efficiency evaluation model, calculates road utilization ratio index.In downtown area, along the land-use development of road It is more easy to obtain the raising of higher return, beneficially economic benefit, but crosses and can destroy again for road of great width The contact of both sides, road, reduces economic benefit, and therefore the proportionate relationship between link length and path area can Determine the business efficiency of the actual utilization of center road.

Road utilization ratio index is determined by following function model:

$P=\frac{{\mathrm{\Σ}}_{i=1}^n{l}_i\×2}{{\mathrm{\Σ}}_{i=1}^n{a}_i}=\frac{L\×2}{A}$

a_iTwo l_i×d_i

In formula: P center road utilization ratio index, i i-th section, l_iI-th section Centerline length (m), d_iThe Road width (m) in i-th section, the road axis in L center Total length (m), a_iPath area (the m in i-th section²), the A center internal road gross area (m²).

What road axis reacted is the effective length of road, and the formation of a road can be same in road 2 side Time formed 2 frontages, therefore using 2 times of length as center road frontage of road-center line length Degree index.And center road utilization ratio P value is the highest, show that in roadnet, frontage length proportion is more Greatly, interface benefit is the best, then the probability that business commercial activity occurs is the biggest, and the result of management of road both sides is more Good.In downtown area, the most along traffic network launch interface, block mean the most service machines Meeting.When less path area assume responsibility for more critical surface, then represent road high efficiency and utilize centering The directly contribution of heart district economic benefit is bigger.

Step 5: adjust center link length, width and road structure for work platforms with AUTOCAD software, And reacquire each section centerline length after Road adjustment and Road width data, after calculating Road adjustment Center road utilization ratio index.Through repeatedly adjusting, calculating, the road obtaining each method of adjustment utilizes effect Rate index, and by the comparison of road utilization ratio index, determine that center road utilizes prioritization scheme.

Wherein, described step 2 particularly as follows:

Step 2.1: Survey Research Center's district's road conditions on the spot, and with step 1 obtain Vector Topographic Map carry out right According to；

Step 2.2: utilize hand-held three-dimensional laser scanner present situation is changed location to carry out field surveys, obtain By way of variation location, road Vector Topographic Map data；

Step 2.3: by AUTOCAD software, the variation location Vector Topographic Map data obtained with mapping are replaced Corresponding data in the Vector Topographic Map that step 1 obtains, it is thus achieved that center up-to-date Vector Topographic Map data.

Wherein, described step 3 particularly as follows:

Step 3.1: draw each section centrage with PLINE order in AUTOCAD software；

Step 3.2: obtain center, each section line length drawn with PROPERTIES order in AUTOCAD software Degrees of data；

Step 3.3: measure the Road width data obtaining each section with DIST order in AUTOCAD software.

Wherein, described step 4 particularly as follows:

Step 4.1: each section centerline length data l that step 3 is recorded_iAnd each section Road width data Di is multiplied, and obtains each section area data a_i；

Step 4.2: by each section area data a_iSum up process, obtain center road gross area A；

Step 4.3: by each section centerline length data l_iSum up process, obtain the road in center Centrage total length L；

Step 4.4: the road axis total length L in center and the ratio of center road gross area A, It is center land utilization efficiency indices P.

Wherein, described step 5 particularly as follows:

Step 5.1: by the drafting of AUTOCAD software, delete, extend isovector edit commands, to center District's road is adjusted；

Step 5.2:: the road axis after measuring and calculating Road adjustment and path area index again；

Step 5.3: the index input road utilization ratio assessment models that will record, obtains new road and utilizes effect Rate index；

Step 5.4: repeat step 5.1 to step 5.3, until it reaches optimum center road utilization ratio.

Owing to being at the enterprising Row sum-equal matrix in existing road basis, so the feasibility of adjustment should be taken into full account, some Section can increase area, some can newly added road sections, finally obtain be one adjust after comprehensive assessment result. And under the restriction of downtown area tale quale, Road adjustment also has certain restriction, its Adjusted Option It is limited, therefore by the calculating of the road utilization ratio index of each scheme and compare, it is possible to try to achieve The maximum of downtown area road utilization ratio index under existence conditions, with this understanding, center road Utilization ratio is the highest, and this scheme is the optimal case of center Road adjustment.

Beneficial effect: the one that the present invention provides assesses city based on road section centerline length and path area The method of center road utilization ratio, on the one hand for the downtown area that land values are the highest, proposes road The assessment of road utilization ratio and method for improving, more realistic meaning and use value；On the other hand simplify Road utilization ratio evaluation index system, has constructed relatively simple model intuitively, and data are more easy to obtain, the most more For accurately, and data objectivity is relatively strong, and can be directly used in the adjusting and optimizing of instructing center district road.

Accompanying drawing explanation

Fig. 1 is the method flow diagram of the embodiment of the present invention；

Fig. 2 is road utilization ratio assessment figure in center, Guangzhou Beijing Road in the embodiment of the present invention.

Detailed description of the invention

Below in conjunction with specific embodiment, it is further elucidated with the present invention, it should be understood that these embodiments are merely to illustrate The present invention rather than restriction the scope of the present invention, after having read the present invention, those skilled in the art couple The amendment of the various equivalent form of values of the present invention all falls within the application claims limited range.

The technical side of the present invention is explained below with reference to Guangzhou Beijing Road center case and accompanying drawing Case.

Downtown area road utilization ratio assessment and application process, including 5 steps: first determine center The evaluation index of district's road utilization ratio, builds the assessment models of center road utilization ratio；Then obtain Each center, city Vector Topographic Map data, and on the basis of Spot Test, it checked and adjust； Then by AUTOCAD computed in software, each achievement data is obtained；The data input assessment models that will obtain, Obtain downtown area road utilization ratio index, on this basis, with AUTOCAD software as work platforms, By constantly adjusting-assessment-lifting center road utilization ratio.

Idiographic flow as it is shown in figure 1, and be described in detail as follows:

Step 1: obtain downtown area Vector Topographic Map data, can be bought by local Surveying And Mapping Institute, or pass through Cooperation with local regional planning agency obtains.In the practice of center, Guangzhou Beijing Road, it is by advising with Guangzhou Draw office's cooperation to obtain.

Step 2: center road conditions is carried out on-site inspection and measurement, and Vector Topographic Map is adjusted And supplement, obtain up-to-date Vector Topographic Map data.

Step 2.1: Survey Research Center's district's road conditions on the spot, and with step 1 obtain Vector Topographic Map carry out right According to；

Step 2.2: utilize hand-held three-dimensional laser scanner present situation is changed location to carry out field surveys, obtain By way of variation location, road Vector Topographic Map data；

Step 2.3: by AUTOCAD software, the variation location Vector Topographic Map data obtained with mapping are replaced Corresponding data in the Vector Topographic Map that step 1 obtains, it is thus achieved that center up-to-date Vector Topographic Map data.

Step 3: by AUTOCAD software, Vector Topographic Map data is carried out vector edition, calculate and obtain each road Section centerline length and Road width.

Step 3.1: draw each section centrage with PLINE order in AUTOCAD software；

Step 3.2: obtain center, each section line length drawn with PROPERTIES order in AUTOCAD software Degrees of data；

Step 3.3: measure the Road width data obtaining each section with DIST order in AUTOCAD software.

As in figure 2 it is shown, in center, Guangzhou Beijing Road, i-th road section length is 133m, Road width For 30m, calculating this section area on this basis is 3990m²。

Step 4: build center road based on each road section centerline length obtained and Road width and utilize Efficiency evaluation model, calculates road utilization ratio index.In downtown area, along the land-use development of road It is more easy to obtain the raising of higher return, beneficially economic benefit, but crosses and can destroy again for road of great width The contact of both sides, road, reduces economic benefit, and therefore the proportionate relationship between link length and path area can Determine the business efficiency of the actual utilization of center road.

Road utilization ratio index is determined by following function model:

$P=\frac{{\mathrm{\Σ}}_{i=1}^n{l}_i\×2}{{\mathrm{\Σ}}_{i=1}^n{a}_i}=\frac{L\×2}{A}$

a_i=l_i×d_i

In formula: P center road utilization ratio index, i i-th section, l_iI-th section Centerline length (m), d_iThe Road width (m) in i-th section, the road axis in L center Total length (m), a_iPath area (the m in i-th section²), the A center internal road gross area (m²).

What road axis reacted is the effective length of road, and the formation of a road can be same in road 2 side Time formed 2 frontages, therefore using 2 times of length as center road frontage of road-center line length Degree index.And center road utilization ratio P value is the highest, show that in roadnet, frontage length proportion is more Greatly, interface benefit is the best, then the probability that business commercial activity occurs is the biggest, and the result of management of road both sides is more Good.In downtown area, the most along traffic network launch interface, block mean the most service machines Meeting.When less path area assume responsibility for more critical surface, then represent road high efficiency and utilize centering The directly contribution of heart district economic benefit is bigger.

Being calculated by data and calculate, obtaining center, Guangzhou Beijing Road present situation land utilization efficiency index is 158.3。

Step 5: adjust center link length, width and road structure for work platforms with AUTOCAD software, And reacquire each section centerline length after Road adjustment and Road width data, after calculating Road adjustment Center road utilization ratio index.Through repeatedly adjusting, calculating, the road obtaining each method of adjustment utilizes effect Rate index, and by the comparison of road utilization ratio index, determine that center road utilizes prioritization scheme.

Step 5.1: by the drafting of AUTOCAD software, delete, extend isovector edit commands, to center District's road is adjusted；

Step 5.2:: the road axis after measuring and calculating Road adjustment and path area index again；

Step 5.3: the index input road utilization ratio assessment models that will record, obtains new road and utilizes effect Rate index；

Step 5.4: repeat step 5.1 to step 5.3, until it reaches optimum center road utilization ratio.

Owing to being at the enterprising Row sum-equal matrix in existing road basis, so the feasibility of adjustment should be taken into full account, some Section can increase area, some can newly added road sections, finally obtain be one adjust after comprehensive assessment result. And under the restriction of downtown area tale quale, Road adjustment also has certain restriction, its Adjusted Option It is limited, therefore by the calculating of the road utilization ratio index of each scheme and compare, it is possible to try to achieve The maximum of downtown area road utilization ratio index under existence conditions, with this understanding, center road Utilization ratio is the highest, and this scheme is the optimal case of center Road adjustment.

The above is only the preferred embodiment of the present invention, it should be pointed out that: common for the art For technical staff, under the premise without departing from the principles of the invention, it is also possible to make some improvements and modifications, These improvements and modifications also should be regarded as protection scope of the present invention.

Claims (4)

1. the method assessing downtown area road utilization ratio based on road section centerline length and path area, it is characterised in that include with Lower step:

Step 1: obtain downtown area existing Vector Topographic Map data；

Step 2: center road conditions is carried out on-site inspection and measurement, and existing Vector Topographic Map is adjusted and supplements, obtain up-to-date Vector Topographic Map data；

Step 3: use AUTOCAD software that Vector Topographic Map data carries out vector edition, calculate and obtain each section centerline length and Road width；

Step 4: build center road utilization ratio assessment models based on each road section centerline length obtained and Road width, calculates road profit With efficiency index,

Road utilization ratio index is determined by following function model:

$P=\frac{{\mathrm{\Σ}}_{i=1}^n{l}_i\×2}{{\mathrm{\Σ}}_{i=1}^n{a}_i}=\frac{L\×2}{A}$

a_i=l_i×d_i

In formula: P center road utilization ratio index, i i-th section, l_iThe centerline length (m) in i-th section, d_iI-th section Road width (m), road axis total length (m) in L center, a_iPath area (the m in i-th section²), in A center The road gross area (m²)；Step 5: adjust center link length, width and road structure with AUTOCAD software for work platforms, lay equal stress on Each section centerline length after new acquisition Road adjustment and Road width data, calculate Road adjustment rear center district's road utilization ratio index, obtain Take the road utilization ratio index after repeatedly adjusting, and by the comparison of road utilization ratio index, determine that center road utilizes prioritization scheme.

The method assessing downtown area road utilization ratio based on road section centerline length and path area the most according to claim 1, its It is characterised by that step 2 comprises the following steps:

Step 2.1: Survey Research Center's district's road conditions on the spot, and compare with the Vector Topographic Map of step 1 acquisition；

Step 2.2: utilize hand-held three-dimensional laser scanner present situation is changed location to carry out field surveys, obtain road variation location Vector Topographic Map Data；

Step 2.3: by AUTOCAD software, the Vector Topographic Map that the variation location Vector Topographic Map data replacement step 1 obtained with mapping obtains In corresponding data, it is thus achieved that center up-to-date Vector Topographic Map data.

The method assessing downtown area road utilization ratio based on road section centerline length and path area the most according to claim 1, its It is characterised by that step 3 comprises the following steps:

Step 3.1: draw each section centrage with PLINE order in AUTOCAD software；

Step 3.2: obtain each section centerline length data drawn with PROPERTIES order in AUTOCAD software；

Step 3.3: measure the Road width data obtaining each section with DIST order in AUTOCAD software.

The method assessing downtown area road utilization ratio based on road section centerline length and path area the most according to claim 1, its It is characterised by that step 4 comprises the following steps:

Step 4.1: each section centerline length data l that step 3 is recorded_iAnd each section Road width data d_iIt is multiplied, obtains each section area number According to a_i；

Step 4.2: by each section area data a_iSum up process, obtain center road gross area A；

Step 4.3: by each section centerline length data l_iSum up process, obtain the road axis total length L in center；

Step 4.4: the road axis total length L in center is multiplied by the ratio of 2 and center road gross area A, is center road and utilizes Efficiency index P.5, according to claim 1 assess downtown area road based on road section centerline length and path area and utilize effect The method of rate, it is characterised in that step 5 comprises the following steps:

Step 5.1: by the drafting of AUTOCAD software, delete, extend vector edition order, center road is adjusted；

Step 5.2: the road axis after measuring and calculating Road adjustment and path area index again；

Step 5.3: the index input road utilization ratio assessment models that will record, obtains new road utilization ratio index；

Step 5.4: repeat step 5.1 to step 5.3, until it reaches optimum center road utilization ratio.