CN101117783A

CN101117783A - Plane reentrant point road unit and uses thereof

Info

Publication number: CN101117783A
Application number: CNA2007100593401A
Authority: CN
Inventors: 张立胜
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-29
Filing date: 2007-08-29
Publication date: 2008-02-06
Anticipated expiration: 2027-08-29
Also published as: CN100564678C

Abstract

The present invention discloses a plane retracing point road unit and the application of the plane retracting point road unit. The plane retracing point road unit of the present invention is realized by the following technical proposal. The road unit is composed of 2 or 4 retracing point basic structures, which is composed of a guidance belt, a retracing driveway and safety protection facilities; the guidance belt takes the central line of the road as the straight edge, the bevel edge is rightwards from the straight edge with an angle less than 7 degrees, an arc taking the opposite edge as the diameter to make a geometric figure to form the guidance belt, and the width of the opposite edge is at least 1 driveway; the retracing driveway surrounding the guidance belt are two driveways; safety protection facilities are arranged at the dead head of the arc top of the retracing driveway, and 2 driveways are arranged at the reserve traveling section in the safety protection range. The design of the plane retracing point road unit is used to make vehicles change drive direction quickly, distribute small-sizes vehicles at the intersection, and make the waiting for passing transferred to fast distribution and transit. On urban roads, reasonable retracing point forms a road retracing system to improve the transit capability of urban roads.

Description

Plane turn back a roadway element and application thereof

Technical field

The present invention relates to the traffic design field, more particularly, relate to a kind of plane turn back a roadway element and application.

Background technology

Urban road congestion is perplexing the somebody of institute, peak period particularly on and off duty, the traffic capacity extreme difference at considerable crossing at present, automobile stands in a long queue, not only at elapsed time, and start-stop operation continually, the excessive discharging of tail gas all is very serious to automobile wearing and tearing and air pollution.Simultaneously this trip inconvenience, the negative effect that brings also is immeasurable.

Automobile generally has four travel directions to the crossroad, Here it is keeps straight on, turns right, turns left and turn around.Present plane crossing is current, mainly keeps straight on and left-hand rotation with control, increases the parallel passage that waits of this both direction, improves the crossing traffic capacity.But under the situation of big flow, because the traffic lights number of transitions is many, wait the lamp time long, vehicle is assembled fast, and the as easy as rolling off a log crossing of causing is crowded not smooth.

Here turning back of car not only be difficult to walk also dangerous, so often by forbidden.Yet the standard turning back of car travels intentionally, is not well paid attention to by people.Draw a new notion, ' function of turning back ' of road that Here it is.It is inevitably that modern road is turned back, and it is extremely urgent to satisfy the rto request that vehicle safety turns around fast.Particularly to solve the crossing congestion phenomenon, must shunt a part of vehicle and go to detour.Certainly, it is near more fast more, safe more smooth and easy good more to detour, and this just needs road to possess special-purpose, big flow, safe reentrant pathway smoothly.

Summary of the invention

Technical problem to be solved by this invention proposes some roadway element design of turning back of a kind of novel planar exactly, not only is used for vehicle safety and turns around fast, and main effect is a shunting crossing compact car, makes the crossing routine wait that current to become quick shunting current.On urban road, rational deployment is turned back a little, forms road system of turning back, and to improve the whole traffic capacity of urban road, provides a kind of plane turn back a roadway element and application.

A plane of the present invention roadway element of turning back is achieved by following technical proposals, and described roadway element is made up of 2 or 4 basic structure of turning back, and a described basic structure of turning back is made up of guidance tape, turn back track and security protection facility; Guidance tape is to be straight flange with the road axis, and the angle that is offset to the right less than 7 ° is a hypotenuse, is the road surface guidance tape that geometric figure that the circular arc of diameter is formed constitutes again with the opposite side, square size at least 1 track; Turn back the track around described guidance tape setting, is two tracks; Dead ahead on the arc top, track of turning back is provided with the security protection facility, and the security protection scope is 2 tracks in the part in the road that drives in the wrong direction.

The plane of the present invention roadway element application on the highway section in the middle of the road of turning back.

The plane of the present invention roadway element application in the road at the parting of the ways of turning back.

The present invention has following beneficial effect:

A. a roadway element is turned back not only for vehicle pass-through has increased a selection that safety turns around in the plane, and its main effect is a shunting adjacent intersection vehicle, makes routine wait that current to become quick shunting current.Though turn back and a little taken some path areas in the plane, its shunting action safely and fast can be saved crossing parking in the past and be assembled needed place.In other words, its effect is distributed to crossing pressure in the whole road stroke exactly, is to make full use of the urban road resource, excavates the inherent potential bearing capacity of road, improves extraordinary technical guarantee of road driving speed.

B. the safe waiting area in the design of a some roadway element of turning back, plane, not only play the effect of protecting grade vehicle, and the place of assembling is provided for bicycle and pedestrian, the narrower roadway that is divided into simultaneously also is convenient to bicycle (bicycle) and pedestrian and is passed through in a short period of time very much.Mostly be bicycle (bicycle) and pedestrian this facility is provided, not only make things convenient for their standard current, the traffic accident that the phenomenon of can also avoiding crossing roads randomly causes.

C. the distance between two planes are turned back a little can extend at random, just can form big ' rotary island ', but its functionality advantage is more much bigger than rotary island.On urban road, rational deployment is turned back a little, forms road system of turning back, and will improve the whole traffic capacity of urban road greatly.

D. plane the roadway element design floor space of turning back is little, investment again seldom, it is very short to finish the duration, but it stop up role to relieving traffic congestion, avoiding be very big.The appearance of this technology will be widely used in road construction.

E. actively promote above-mentioned technology, realize that vehicle is smooth and easy current, not only can improve present urban traffic conditions, and the society that produces and economic benefit can think and.Because the frequent start-stop of motor vehicle, the harmful components concentration of discharging tail gas is higher than cruising far away.Wait quantity and time so reduce the crossing vehicle, will the improvement of urban air-quality also be played an important role.Maximum effect is to have improved people to go out line speed, has saved the travel time, make people happy, healthy, work hard, after all the each side economic benefit is promoted to some extent.

Description of drawings

Fig. 1 is the invention floor map;

Fig. 2 is the floor map of using among the present invention at the parting of the ways;

Fig. 3 is that the present invention improves the floor map that the current mode in crossing is used example.

The specific embodiment

Below in conjunction with accompanying drawing the present invention is further described.

As shown in Figure 1, roadway element is made up of 2 basic structures of turning back, and a described basic structure of turning back is made up of guidance tape 12, turn back track and security protection facility 11.Guidance tape is to be straight flange with the road axis, and the angle that is offset to the right less than 7 ° is a hypotenuse, is the road surface guidance tape that geometric figure that the circular arc of diameter is formed constitutes again with the opposite side, square size at least 1 track; Turn back the track around described guidance tape setting, is two tracks; Dead ahead on the arc top, track of turning back is provided with the security protection facility, and the security protection scope is 2 tracks in the part in the road that drives in the wrong direction.

The important function of a basic structure of turning back guarantees that exactly turn inside diameter is unaffected, smooth and easy the turning around of safety, and the clearance of allowance vehicle normal open becomes possibility.Because be compact car more than 90 percent on the urban road, so a described basic structure of turning back relatively is fit to the main flow design that compact car turns around to travel.If turning around to travel, suitable large car, overlength car should suitably increase the width in the zone of turning back.If improve the craspedodrome ability, can expand the limit on this basis and increase the track.

Fig. 1 is made up of two compact dorsad basic structures of turning back for some roadway element design of turning back of road midplane.This roadway element just can be realized at 2 and turn back on the area of a road occupying of turning back, can also form the passage with security protection in the middle of the while.It crosses the place that road provides a gathering on the one hand bicycle (bicycle) and pedestrian, on the other hand a broad roadway is divided into two narrower roadways, and it is current to be convenient to very much giving another vehicle the right of way for safety of each driving body.Nearer crossing of a distance of turning back in the general requirements road, is sailed into and is turned back a little so that vehicle has enough low-angle direct motion modified line distances more preferably greater than 500 meters.

One block up the arterial highway, plane crossing both sides that is difficult to walk on, greater than 500 meters place, a midplane roadway element of turning back in road is set.On this basis, just can improve the current mode in crossing, see Fig. 3, main technical schemes is:

1. the compact car left-hand rotation of restriction four direction and the compact car on the by-path are kept straight on, and make them go without exception to detour to turn back a little by trail guide.Compact car on the arterial highway will turn left, and when letting pass with green light, turn back a little in the dead ahead of can detouring.Compact car on the by-path turns left and keeps straight on, the passage that the normal open of all walking to turn right is let pass, and turn back a little in the right front of detouring.

2. the crossing traffic lights only need conversion twice, set the current green light in arterial highway and let pass 40 seconds, and the conversion red light waited 20 seconds.The large car that turn left this moment because quantity is few, can together be let pass with through vehicles.For preventing that bicycle and pedestrian from turning left to influence the direct motion vehicle, with bicycle and pedestrian's special-purpose traffic lights, turn left with the restriction of left-hand rotation red light, but may extend into waiting area in the road, turn left again when waiting green light to be transformed; Set the current red light of by-path and waited 40 seconds, the conversion green light was let pass 20 seconds.Though current waiting time is long, compact car all goes to detour, and the remaining little gathering of large car flow is slow, and bicycle (bicycle) and pedestrian's road occupying area are again little, can not form obstruction.Behind the conversion green light, the clearance time is short, and giving another vehicle the right of way for safety travels also can pass through the crossing soon.Peak period, take to force shunting.The normal period, the STOCHASTIC CONTROL shunting.Low-valley interval can travel naturally.

Fig. 2 is made up of four basic structures of turning back of separating dorsad for intersection plane the roadway element design of turning back.This roadway element not only provides the omnirange selection to vehicle ', and provides the function of turning back that detours for four adjacent intersections.

On the highway section of narrow relatively (as Four-Lane Road or six-lane), a plurality of little crossings that distributing again, under the situation about being difficult to walk of blocking up, can be at place, the crossing of two broads, build an intersection plane roadway element of turning back.Isolate road motor vehicle up and down then, adding turns back a little possesses the condition that normal open is let pass, and compact car is realized more swimmingly around travelling.Again because there is an annular guide line in a crossing central authorities of turning back, large car also according to this line realize around travelling.

Wherein numeral is among Fig. 2 and Fig. 3:

1 security protection wall

2 bicycles (bicycle) and pedestrains safety waiting area, edge installation interval flap.

3 bicycles (bicycle) traveling lane and road surface guiding are the image of overlooking of bicycle, And directionality arranged.

4 sign boards, for to vehicle and don, there won't be any problem with cautions such as sensing.

5 compact car traveling lanes and only accurate compact car turn around to travel, and are yellow, and S represents compact car.

6 normal open clearance passages, no parking is detained.

7 guide lines.

8 large car traveling lanes and only accurate large car are kept straight on or are turned left, and are yellow, and L represents large car.

9 large car traveling lanes and only accurate large car turn left, and are yellow, and L represents large car.

10 large car traveling lanes and only accurate large car are kept straight on, and are yellow, and L represents large car.

Claims

1. plane roadway element of turning back is characterized in that described roadway element is made up of 2 or 4 basic structure of turning back, and a described basic structure of turning back is made up of guidance tape, turn back track and security protection facility; Guidance tape is to be straight flange with the road axis, and the angle that is offset to the right less than 7 ° is a hypotenuse, is the road surface guidance tape that geometric figure that the circular arc of diameter is formed constitutes again with the opposite side, square size at least 1 track; Turn back the track around described guidance tape setting, is two tracks; Dead ahead on the arc top, track of turning back is provided with the security protection facility, and the security protection scope is 2 tracks in the part in the road that drives in the wrong direction.

2. the plane as claimed in claim 1 roadway element application on the highway section in the middle of the road of turning back.

3. the plane as claimed in claim 1 roadway element application in the road at the parting of the ways of turning back.