Traffic Organization of Freeway Trumpet Interchange Reconstruction and Expansion with All Ramps Unimpeded

Abstract

Trumpet interchange is one of the most common types of interchange in the four-lane freeway and it is critical to organize traffic effectively during the reconstruction of it. The difficulties and key issues in traffic organization during reconstruction and expansion project of trumpet interchanges can be found out by analyzing the layout of ramps, traffic characteristics, reconstruction and expansion schemes and main construction technologies. Based on the idea of all ramps unimpeded, the general principles and methods of traffic organization of the trumpet interchange reconstruction and expansion project are put forward by considering the traffic characteristics, traffic volumes, reconstruction design proposals and construction period. The traffic organization during the trumpet interchange reconstruction and expansion project in Hohhot-Baotou freeway is analyzed, which may provide a useful reference for the traffic organization of the trumpet interchange reconstruction and expansion project in future. Trumpet interchange is one of the most common types of interchange in the freeway in our country, featured with simple form and only one Overpass Bridge and centralized toll stations. Taking Hohhot-Baotou freeway as an example, it has thirteen interchanges along 207 kilometers in length. Nine of them are trumpet interchange, which account for seventy percents. As the relation of the locations between the newly designed ramps and the old ones are complex, the quantities are large, the quantities of structures are immense and it's hard to arrange the construction units, the trumpet interchange reconstruction and expansion project has a serious impact on the safety and smooth flow of traffic. Working out a reasonable plan of traffic organization during the construction of trumpet interchange reconstruction and expansion, could avoid traffic congestion and accidents. It could also make sure the good process of the project and reduce the bad effect on the society and economic.