01154487

Component

The design of rural interchanges is of critical concern due to the need for the safe transition of vehicles from one high speed roadways to another and vice versa. This transition is accomplished by entry and exit ramps of various forms. The southbound entry loop ramp at the US 27/ US 192 trumpet interchange in Polk County, Florida has a historically high incidence of vehicular off-tracking. The geometry of the southbound entry ramp coupled with high approach speeds are two of the contributing factors. Due to the high cost of interchange modification and ramp realignment, one approach to increasing safety at the interchange is to decrease approach speeds utilizing a Dynamic Speed Monitoring (DSM) system. The objective of this paper is to test the effectiveness of such a DSM system which is solar powered, radar based, with a wireless speed warning system which potentially could be used at traffic locations where it is difficult to secure power and to extend wiring. The Measures of Effectiveness (MOEs) for the system were the reduction in mean and variance of speed. This paper describes the testing of the DSM effectiveness and involves the documentation of the experiments conducted, the data collected and the analysis of the results.

01147878

10-2766

English

18p

2010

Transportation Research Board 89th Annual Meeting

DVD

Figures; Maps; Photos; References (8) ; Tables (5)

Highway curves; Highway operations; Interchanges; Measures of effectiveness; Monitoring; Rural highways; Solar power generation; Warning signals; Warning systems; Wireless communication systems

Dynamic speed limits

Design; Environment; Highways; I20: Design and Planning of Transport Infrastructure

Transportation Research Board Annual Meeting 2010 Paper #10-2766

TRIS, TRB

Jan 25 2010 11:21AM