In addition to limited data, the methodology does not conform to the fundamental relationship of traffic flow, namely that flow is the product of speed and density. Although weaving segment analysis was updated more recently, the relationship with the merge and diverge methodologies have not been clearly addressed. The current freeway merge and diverge methodologies in Chapter 14 of the 6th edition of the Highway Capacity Manual (HCM) were developed over 25 years ago using limited field collected data. To alleviate or mitigate the impacts of congestion at these segments, a number of active management operational strategies have been implemented such as ramp metering, hard shoulder running, managed lanes, etc. Update of Highway Capacity Manual: Merge, Diverge, and Weaving Methodologiesįreeway congestion usually occurs at freeway merge, diverge, and weaving segments that have the potential to develop bottlenecks.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |