What are the design principles of elevated road ramps?
Principles for design of elevated roads:
(1) The layout of ramps should meet the traffic needs of elevated roads in the road network to the greatest extent, improve the utilization rate of elevated roads, and make driving on elevated roads easier. The traffic travel time of the road is the shortest, and the function of each ramp is fully utilized, so that the elevated road and ground road system can effectively achieve the purpose of relieving urban traffic, collecting and distributing external traffic, and diverting transit traffic.
(2) The location of the ramp should be consistent with the current traffic situation and the main flow direction in the planned road network.
(3) The spacing between ramps should be reasonable. On the one hand, it is necessary to ensure the smooth flow of expressways and reduce the impact of interweaving, merging, and diversion sections caused by ramp exits and entrances; on the other hand, attention should be paid to the spacing between ramps. It should not be too large, causing the flow at the junction of the ramp and the surface road to be too concentrated and blocking traffic.
(4) Pay attention to the land use and building demolition conditions, adapt measures to local conditions, combine the near and long term, and reserve the location for the continued ramp construction.
(5) The layout of ramps should try to avoid connecting in front of major transverse road intersections, pay attention to the traffic organization role of the road network in adjacent areas, and set up auxiliary lanes according to local conditions to ease traffic.
(6) Under the premise of ensuring the main line design standards. The layout of ramps (symmetry, dislocation, orientation, etc.) should be adapted to local conditions. Minimize demolition, make full use of existing road width, and increase the width of environmental facilities.
(7) Select the ramp location based on the actual situation and implementation possibility.
The above content is compiled based on the problems encountered by students in actual work for reference. If you have any questions, please communicate and correct them in time.