00348066

Monograph

http://onlinepubs.trb.org...bs/nchrp/nchrp_rpt_236.pdf

The objective of this research was to evaluate the effectiveness of channelizing traffic control devices and to determine how these devices should be designed and used to guide drivers as they approach and proceed through a work zone. Research included device size, shape, reflectorization, internal illumination, and spacing for both day and night conditions; only stationary work zones were studied (i.e., major reconstruction type projects). This research was carried out in two phases-NCHRP Project 17-4, "Evaluation of Traffic Controls for Street and Highway Work Zones," and NCHRP Project 17-4(2), "Evaluation of Traffic Cones and Tubes for Street and Highway Work Zones." The effectiveness of barricades, panels, cones, and tubes was initially investigated in Project 17-4 through a series of tests including simulated conditions in a laboratory setting, controlled field tests using instrumented vehicles on closed highway sections, and observation of driver performance at actual construction sites. Because the traffic cones and tubes tested in the first phase displayed relatively poor characteristics under nighttime conditions, further study of these devices using improved reflectorization and internal lighting was conducted in the second phase, Project 17-4(2). The second phase consisted of controlled studies on closed highway sections. Both phases were conducted by Bio-Technology, Inc., and the combined findings are described in this report. (Author)

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187 p.

1981-10

NCHRP Report

Appendices; Figures; References; Tables

Barriers (Roads); Cones; Measures of effectiveness; Panels; Reflectorized materials; Shape; Size; Spacing; Tubing; Work zone traffic control

Barriers; Channelization; Effectiveness

Construction; Highways; Maintenance and Preservation; Operations and Traffic Management; Safety and Human Factors; Vehicles and Equipment; I52: Construction of Pavements and Surfacings; I61: Equipment and Maintenance Methods; I73: Traffic Control; I82: Accidents and Transport Infrastructure

TRIS, TRB

Mar 30 1982 12:00AM