"3-1" or "3+1" Tricyclic Road Transit Tentative Two Plan

Recently, Beijing’s transportation department responded to this year’s proposal for Beijing’s two conferences, No. 0599, “to facilitate passengers to travel quickly and add bus lanes to the Third Ring Road.” It was disclosed that the Sanhuan public transport busway is tentatively scheduled for two types of plans: It is to take a lane in the existing three lanes as a dedicated lane and link it all the way through; the other is to change the three lanes into four lanes and choose one lane to be used as a dedicated lane in some areas.

(Source: "Beijing Times")

Both programs are very difficult to implement. During the Beijing two sessions this year, many members of the CPPCC proposed to develop public transport and form special lanes on the main commuter roads to give priority to public transportation. According to the contents of the reply, the city's transportation department has already done a preliminary investigation and proposed two plans for opening a bus lane on the Third Ring Road.

According to the traffic department, both programs are very difficult to implement. The first kind of time-differentiated start-up method using Jingtong Bus Rapid Transit lanes was initiated in the morning and evening in the inner ring and outer ring. “If the morning-to-peak south-to-north car is more, then this section is set to start in the morning.” According to the person in charge, the exclusive lane is located on the outermost side, and it is convenient for entering and leaving the station.

However, at present, the traffic flow during the peak hours of the Third Ring Road is saturated. The peaks occupied by the morning and evening peaks will inevitably affect the social vehicles. If this approach is adopted, the transportation department will support the connection of some surrounding road networks and loops to divert social vehicles.

The second type of implementation is very difficult. "It is basically impossible under the present circumstances." The person in charge said that based on the three lanes, "hands-up a lane" requires the sacrifice of the width of each lane, and each article will be reduced to 3 Meters around. In accordance with the requirements of the construction of urban expressways, the minimum size of motorized roads is 3.25 meters. "With such a narrow lane, driving at high speed will be dangerous."

The person in charge of considering the emergency road as a bus route said that the relevant department had considered changing the three-ring emergency lane into a bus lane not long ago, but it had not been approved by the city’s leaders.

For example, he cited the fact that the proposed expansion of bus lanes in certain road sections is conditional, but it is not easy to sacrifice the width of the main road or to compress the non-motor vehicle lane of the auxiliary road. According to its disclosure, the implementation of the three-ring bus route has been put on the agenda. At the beginning of the year, the design unit was commissioned to conduct research on the overall situation of the Third Ring Road. It was not long before the investigation was conducted on the Beijing-Kaikou Expressway and the Beijing-Hong Kong-Macao Expressway to consider whether it is suitable for public transportation. Dedicated road.

"3-1" plan

In the existing three lanes, one lane is selected for full planning, and the morning and evening peaks are activated, referred to as "3-1". It is planned that the bus-only lanes will be continuously planned on the outermost side of the main road of the Third Ring Road, and a deceleration lane of 100 meters will be added to the entrance and exit. As a mixed lane, no bus lane will be planned. It is used from 6:30 to 9:00 and from 17:00 to 19:30 daily. Airport buses, school buses, and legally registered shuttles are expected to enter special lanes. After the implementation of this program, the priority of public transportation will be significant, and the social traffic will disperse other road networks around the Third Ring Road.

"3+1" Plan

In the trial of the West Third Ring Road Bridge to the Yuquanying Bridge, the main road with a width of about 12.25 meters was adjusted from the 3 lanes to the 4 lanes directly with a marking line. Other road sections ensure that there are 3 social lanes on the main road, the conditional road section is widened to 4 lanes, and 1 bus lane is designated. The main road cannot widen the road section, disconnect the bus route, and move the dedicated road to the auxiliary road, which is referred to as the "3+1" plan. If this scheme is adopted, the non-isolation zone of the three-loop machine will be compressed, and the width of some lanes will shrink, and some emergency lanes will be occupied.

â–  About 30% reduction in travel time of background planning bus routes

As early as in 2009, Liu Baoling, a member of the People's Political Consultative Conference and the chairman of the union of the Public Transport Group, submitted a proposal for the establishment of a special bus lane in the Third Ring Road. At that time, the vehicle population in Beijing had not yet exceeded 4 million vehicles. In the subsequent years in Beijing, she also submitted this proposal several times.

She believes that although the existing bus lanes in Beijing have reached 303 kilometers, the network has not yet formed a network for various reasons, and the efficiency of bus operations cannot be truly improved. At present, as the most important public transportation corridor in the city, the Third Ring Road has particularly concentrated passenger flow, lines, and transportation capacity.

The number of public transportation routes in Sanhuan is 201, which accounts for 31% of the total number of urban lines. The daily passenger volume is 5.85 million passengers, accounting for 45% of the total passenger traffic. Moreover, out of the 201 routes, there are 70 bus lines that pass 5 or more stations, which account for 30% of the total number of three-ring routes.

Therefore, if the bus lanes can be planned throughout the Third Ring Road, the speed and efficiency of bus operations on the Sanhuan Road will be greatly improved. The travel time of the Third Ring Road passengers will be reduced by approximately 30%. The operating speed can be achieved by the current 16 km/h to 17 km/h increased to 23 km/h to 24 km/h or more.

â–  It is difficult to form part of the Third Ring Road on some sections of the road. Currently, bus lanes have been designated at some bus station entrances and exits, but none of the road sections form a connected bus lane. Yesterday, the reporter drove from the East Third Ring Road to the West Third Ring Road from the South Third Ring Road. Bus lanes were set up along many stations along the road.

On the Third Ring Road, the longest bus lane is at Liuliqiao, about 100 meters away. Because of the limited conditions, the bus lane can only be connected to the emergency lane markings from the time of entry. After exiting the station, it will be merged into the emergency lane and the marking disappears. The reporter’s emergency lane at the east of the bus station at Muqiyuanqiao Station was gradually merged into the bus bay and entered the platform section. The white marking line became the yellow bus lane marking line, and it exited westward and disappeared after a few meters of buffer bus lanes. The outermost side becomes the emergency lane.

If according to the second plan, the emergency lane is occupied, the three lanes will be changed into four lanes, and one bus lane will be added. The emergency lane along the line is not wide enough. According to visual inspection, the width of the emergency lane of most sections of the road from the Southeast Third Ring Road to the West Third Ring Road is about 2.5 meters, and a small passenger train barely passes through the line. If the speed is faster, the driver will have a sense of conscientiousness.

However, the reporter found that most of the auxiliary roads in the West Third Ring Road have two motor vehicle lanes, such as the Lize Bridge to the Liuli Bridge Line, and the non-isolated space of the compressor. If a bus is selected for a lane in the original three lanes according to the first plan, such conditions are basically met. However, if it is necessary to plan for the entire journey, the bus segment will inevitably intersect with the loop entrance. Bus stops such as Wanliu Bridge and West Bureau will be able to meet the loop entrance shortly after leaving the station. Road traffic speed has an impact.

â–  Opinions support the limited road resources should be guaranteed bus priority - Bo Cheng Engineering Technology (Beijing) Co., Ltd. Wang Jiangyan, technical director of the Third Ring Road situation, do not refer to the bus lanes and not congestion, the use of special lanes may bring more Congestion. However, limited road resources should ensure that public transportation is given priority. If citizens travel faster by public transport, more people will give up driving.

From the two scenarios, I tend to change the three lanes into four lanes. The entire lane of Beijing is still relatively wide, and the narrowest point is also enough for small cars. It is estimated that most of the three rings can be drawn out.

The plan also hopes that the road can be used more efficiently. School buses and legally registered trains are expected to enter special lanes. I think the trend is good. The problem is that this access system is sound and clear. What kind of vehicles can Take the bus lanes, and the number of these vehicles is well known. It cannot be said that the speed of dedicated lanes was reduced when these buses were on bus lanes.

The Third Ring Road of the Opposing Party does not have the conditions for bus lanes. Wang Limei, Secretary-General of the China Road Transportation Association. Given the current congestion situation on the Third Ring Road, I do not think that there is a condition for the development of bus lanes.

In the implementation of the bus route on the Third Ring Road, the import and export congestion problem must be solved first. If this problem cannot be solved, the bus can only be on the main road for a while, and the import and export are still blocked. This does not really make the bus faster. If the three-lane route is changed from three-lane to four-lane, safety issues need to pass through the calculation of the initial bearing capacity of the bridge by the urban construction department.

The plan says that after the bus lane is planned, social traffic can be distributed to other road networks around the Third Ring Road. In fact, at the beginning of the Beijing-Tongshan Expressway, the use of bus lanes proposed to guide social vehicles to take the surrounding roads. However, Jingtong Express is a suburban route, and this condition exists. Third Ring Road in the city, the construction of bus lanes will adjust the entire traffic flow, after all, road resources are limited, there is no such condition. We cannot transplant suburban experiences and practices into urban areas. (

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