01663629

Component

This paper focuses on field implementation and testing of a coordinated ramp metering (CRM) algorithm based on a simplified optimal control approach. The test site was the California State Route 99 Northbound (SR-99N) corridor in Sacramento between Calvine Road and the SR-50 interchange after 12th Avenue (Abs. PostMile 290.454 - 299.467). It is a 9-mile long corridor with 11 on-ramps, to which the CRM algorithm has been applied. By comparing the vehicle-miles-travelled(VMT), vehicle-hours-travelled (VHT), and the ratio VMT/VHT (defined as system efficiency inPeMS and interpreted as average speed) during field tests in 2016 with data from 2015 in the same period, during the morning peak hours (6:00 AM-9:00 AM), VMT/VHT increased by 7.25% on average, indicating traffic efficiency improvement. During the evening peak hours (3:00 PM-6:00 PM), VMT/VHT decreased by 0.44% on average, indicating no traffic efficiency improvement. The reason was that the traffic was not heavily congested during most evening hours. Test results suggest that the CRM algorithm tested could be more effective for heavily congested traffic. The system has been deployed for daily operation along the SR-99N corridor after the test period.

This paper was sponsored by TRB committee AHB20 Standing Committee on Freeway Operations.

18-03554

English

18p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Figures; Maps; References; Tables

Field tests; Highway traffic control; Ramp metering; Traffic signal control systems

California State Route 99

Sacramento (California)

Highways; Operations and Traffic Management

Transportation Research Board Annual Meeting 2018 Paper #18-03554

TRIS, TRB, ATRI

Jan 8 2018 10:53AM