01558187

Component

https://doi.org/10.3141/2490-01

Field test results of a variable speed limit (VSL) control algorithm, a speed-controlling algorithm using shock wave theory (SPECIALIST), were analyzed to elucidate driver response and traffic flow evolution under VSL control. Successful VSL control was characterized by nearly constant, or decreasing, demand over time. In contrast, failed VSL control was attributed to (a) significant increase in demand (during control) and (b) significant net inflow from ramps. The demand increase was found to be the leading cause of the failed control, underscoring that the efficacy of the VSL control greatly relies on its ability to incorporate demand patterns during control. On the basis of these findings, some potential improvements are offered, including a parameter design strategy that incorporates demand patterns.

01582745

15-5096

English

pp 1–10

2015

Transportation Research Record: Journal of the Transportation Research Board

9780309369206

Print

Figures (9) ; References (22) ; Tables (2)

Algorithms; Behavior; Bottlenecks; Driver performance; Drivers; Field tests; Traffic flow; Variable speed limits

Highways; Operations and Traffic Management; Planning and Forecasting; I73: Traffic Control

TRIS, TRB, ATRI

Dec 30 2014 1:42PM

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