Potential MUTCD Criteria for Selecting the Type of Control for Unsignalized Intersections

Developing and Implementing Manual on Uniform Traffic Control Devices Criteria for Selecting Traffic Control for Unsignalized Intersections

“…These evaluation procedures present specific steps to be conducted and factors to be considered. The details of these findings are described in the research report (2).…”

“…The MUTCD sections included in the recommended language are listed below. The initial recommended MUTCD language is provided in an appendix of the research report (2) As criteria were identified, examined, and considered for inclusion in the proposed new MUTCD language, a concern regarding the term ''warrant'' was recognized. The criteria eventually selected for the MUTCD do not necessarily represent the minimum requirements for installing all-way stop control.…”

“… a The type of traffic control at the intersection or the change in traffic control. TW4: four-leg intersection with minor-road (two-way) stop control; AW4: four-leg intersection with all-way stop control. b Average intersection delay for four-leg intersection with four lanes on major and when volume is 300 vehicles per hour (vph)/approach on the major, 200 vph/approach on the minor, 10 ped/h/approach, and 0 bikes/h/approach. c Average annual delay costs/savings determined using the methodology discussed in the project report ( 2 ). The parentheses with dollars represent a negative amount and indicate that more delay is occurring as a result of the intersection control change for cars and trucks.…”

“…In addition to the differences in the level of detail between the warrants for traffic signals and unsignalized control; there have been continued improvements to the signals warrants in recent editions of the MUTCD whereas the warrants for unsignalized control have seen only minor changes since 1971. As there has been more emphasis in recent years on issues such as delay, user costs, safety, pedestrians, and bicycles, the National Cooperative Highway Research Program (NCHRP) established the research project described in this paper ( 2 ) to develop criteria and supporting material to guide in selecting the appropriate traffic control at unsignalized intersections. The basic approach of the research team was to evaluate existing policies and criteria, review previous research, and conduct an economic analysis that established the economic benefits/costs associated with various types of unsignalized control.…”

Pedestrian Crossing Sight Distance: Lateral Clearance Guidelines for Roadways

“…Improving pedestrian safety has been a key objective of transportation organizations in North America and worldwide. Valuable guidelines on the planning and design of pedestrian facilities have been developed by AASHTO (2,3), FHWA (4, 5), NCHRP (6), the Transportation Association of Canada (7), and the New Zealand Transport Agency (8).…”