Traffic Calming
A section roadway defined by pavement markings or raised medians, between opposing lanes of traffic, where pedestrians can stop before finishing crossing a road.
What is pedestrian refuge island?
The process of selecting high priority sites that need safety treatment, often through analysis of crash data.
What is Network Screening?
ADT
What is Average Daily Traffic?
The number of warrants in the MUTCD that justify traffic control signal installation.
What is 9?
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What is roundabout?
A type of roundabout characterized by a small diameter and traversable islands.
What is a mini roundabout?
The number of observed crashes per unit of traffic volume passing through a location.
What is Crash Rate?
LOS
What is Level Of Service?
Outside of temporary traffic control zones, these two colors are allowed for transverse rumble strips within a travel lane.
What are white and yellow?
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What is Diverging Diamond?
An extension of the sidewalk or curb line out into the parking lane, which reduces the effective street width.
What is a curb extension?
The crash severity that "A" in the KABCO scale represents.
What is severe injury?
RCUT
What is a Reduced Conflict U-Turn?
OR
What is a Restricted Crossing U-Turn?
This is the minimum number of primary signal faces required for a through movement at a signalized intersection.
What is 2?
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What is Jughandle?
A series of alternating curves or lane shifts that are located in a position to force a motorist to steer back and forth out of a straight travel path.
What is a chicane?
The Highway Safety Act of 1973 adopted this ratio methodology for federal funding of safety improvements.
What is Benefit Cost Ratio?
NHTSA
What is the National Highway Traffic Safety Administration?
A two-phase traffic signal installed on on-ramps.
What is a ramp meter?
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What is a Quadrant Roadway?
A series of white rectangular markings, placed just inside both edges of the travel lane and spaced progressively closer, to create the illusion of increasing speed when traveling at a constant rate.
What are optical speed bars or speed reduction markings?
This term considers driver, pedestrian, and special user needs and capabilities. As well as how each of these factors impact safety and inform better roadway design.
What are Human Factors?
AASHTO
What is the American Association of State Highway and Transportation Officials?
A measure of how much light is returned from a sign or pavement marking.
What is retroreflectivity?
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What is Continuous Flow?