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Status Report for Human Factors Guideline for Road Systems Design By Sam Tignor January 2013 What is the HFG! A complement to: Expanded documented research on road users needs with easily used information . Why employ their joint use? • 25% fatalities involve road & user interactions. • AASHTO & MUTCD Manuals are design tools • HFG: A guideline for designers & traffic engineers to enhance road user safety designs & treatments. • HSM: A tool to estimate safety • When used together they enhance road user safety. 3 So Why Use the HFG? • Guidelines based on user-needs research • Eliminates searching of published research • Eliminates guesswork about user needs • Aids designers & traffic engineers in project development 4 Brief History • Funded by: NCHRP starting in 2001 • Supporters: - TRB Joint Subcommittee AND10(2) - TRB Committees (capacity, users, vehicles, bikes, pedestrian, visibility, traffic control, and others) - Various international groups 2012 Accomplishments • HFG published in 2012 • 2 FHWA Webinars in 2012 • 3 presentations to AASHTO groups • Presentation at PIARC in 2012 • Pilot Testing; 5 possible; 3 started (Nev, Id, WI) • Mini-workshop for using both HSM & HFG • HFG & HSM Primer to be developed by NCHRP -- January 2013 Easy 2-Page Layout TRB Committee Help Needed! • The HFG is a continuous, long term effort (like: highway capacity manual & HSM) • Helps TRB committees get their key user- oriented criteria recognized & implemented • How: by identifying additional guidelines and research (if needed); • This should be a part of the committees on- going activities Example Guideline Suggestion • Title: Shared Use of Roadway by Motor Vehicles and Bicycles (Hicks) • Discussion: Some rights-of-way (road widths) are limited and it is neither possible nor practicable to have separate dedicated lanes for both motor vehicles and bicycles. In those cases, highway signs are placed (e.g., W11-1, R4-11, W11-16) to remind road users that additional caution is required by all users of the road. The practice of sharing lanes introduces safety for bicycle users and road capacity problems for motor vehicles. So, what are appropriate human factor shared-road-use guidelines from the perspective of the bicyclists and motorists? When should such signs be used and not used in terms of road width, geometrics, traffic volume, and shoulder/bicycle lane presence? • Available research: No human factor studies are available. • Source of research: Some states have crash studies, i.e., Iowa. Simple Process Input/Suggestions JSC Committee A Committee B Committee X NCHRP Contractor Draft Guidelines JSC & Committee Reviews Add to HFG Publish Sections As Developed Next HFG Update • Obtain committee suggestions starting now • Initiate request to NCHRP for next HFG (about 20 months off) • Select contractor (about 30 months) End of Status Report The HFG is available at: http://onlinepubs.trb.org/onlinepubs/nchrp/ nchrp_rpt_600second.pdf Discussion !
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