United States. Department of Transportation. Federal Highway Administration. Office of Safety (2017). Proven Safety Countermeasures - USLIMITS2 (Report No. FHWA-SA-17-070). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/49398
United States. Department of Transportation. Federal Highway Administration. Office of Safety. Proven Safety Countermeasures - USLIMITS2. Report no. FHWA-SA-17-070. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2017. https://rosap.ntl.bts.gov/view/dot/49398.
United States. Department of Transportation. Federal Highway Administration. Office of Safety Proven Safety Countermeasures - USLIMITS2. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2017, Report no. FHWA-SA-17-070, ROSA P. https://rosap.ntl.bts.gov/view/dot/49398.
USLIMITS2 is a free, web-based tool designed to help practitioners assess and establish safe, reasonable, and consistent speed limits for specific segments of roadway. It is applicable to all types of facilities, from rural and local roads and residential streets to urban freeways.
Backplates are added to a traffic signal indication in order to improve the visibility of the illuminated face of the signal by introducing a controll
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Access management is a set of techniques that State and local governments use to control access to highways, major arterials, and other roadways. The
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Access management refers to the design, application, and control of entry and exit points along a roadway. This includes intersections with other road
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Low-cost safety treatments vary by the severity of the curvature and the operating speed. Low-cost treatments typically include methods for warning th
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
A leading pedestrian interval (LPI) gives pedestrians the opportunity to enter an intersection 3-7 seconds before vehicles are given a green indicatio
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Auxiliary turn lanes—either for left turns or right turns—provide physical separation between turning traffic that is slowing or stopped and adjacent
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
A local road safety plan (LRSP) provides a framework for identifying, analyzing, and prioritizing roadway safety improvements on local roads. The LRSP
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Longitudinal rumble strips are milled or raised elements on the pavement intended to alert drivers through vibration and sound that their vehicles hav
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Longitudinal rumble strips are milled or raised elements on the pavement intended to alert inattentive drivers through vibration and sound that their
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Median barriers are longitudinal barriers that separate opposing traffic on a divided highway and are designed to redirect vehicles striking either si
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
A median is the area between opposing lanes of traffic, excluding turn lanes. Medians in urban and suburban areas can be defined by pavement markings,
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
A median is an area between opposing lanes of traffic, excluding turn lanes. Medians in urban and suburban areas can either be open (pavement markings
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
The pedestrian hybrid beacon (also known as the High intensity Activated crossWalK (or HAWK)) is a pedestrian-activated warning device located on the
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
The pedestrian hybrid beacon (PHB) is a traffic control device designed to help pedestrians safely cross busy or higher-speed roadways at midblock cro
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Reduced left-turn conflict intersections are geometric designs that alter how left-turn movements occur in order to simplify decisions and minimize th
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
A Road Diet typically involves converting an existing four-lane undivided roadway to a three-lane roadway consisting of two through lanes and a center
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
While most transportation agencies have established traditional safety review procedures, a road safety audit (RSA) is unique. RSAs are performed by a
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
Roadside design improvement at curves is a strategy encompassing several treatments that target the high-risk roadside environment along the outside o
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
The modern roundabout is a type of circular intersection defined primarily by three basic operational principles: Geometry that results in a low-speed
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
The modern roundabout is a type of circular intersection configuration that safely and efficiently moves traffic through an intersection. Roundabouts
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
The Safety EdgeSM is a proven technology that shapes the edge of a paved roadway at approximately 30 degrees from the pavement cross slope during the
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
SafetyEdgeSM technology shapes the edge of the pavement at approximately 30 degrees from the pavement cross slope during the paving process. This syst
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
This systemic approach to intersection safety involves deploying a group of multiple low-cost countermeasures, such as enhanced signing and pavement m
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
A walkway is any type of defined space or pathway for use by a person traveling by foot or using a wheelchair. These may be pedestrian walkways, share
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
At a signalized intersection, the yellow change interval is the length of time that the yellow signal indication is displayed following a green signal
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United States. Department of Transportation. Federal Highway Administration. Office of Safety
United States. Department of Transportation. Federal Highway Administration. Office of Safety (2017). Proven Safety Countermeasures - USLIMITS2 (Report No. FHWA-SA-17-070). United States. Department of Transportation. Federal Highway Administration. Office of Safety. https://rosap.ntl.bts.gov/view/dot/49398
United States. Department of Transportation. Federal Highway Administration. Office of Safety. Proven Safety Countermeasures - USLIMITS2. Report no. FHWA-SA-17-070. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2017. https://rosap.ntl.bts.gov/view/dot/49398.
United States. Department of Transportation. Federal Highway Administration. Office of Safety Proven Safety Countermeasures - USLIMITS2. United States. Department of Transportation. Federal Highway Administration. Office of Safety, 2017, Report no. FHWA-SA-17-070, ROSA P. https://rosap.ntl.bts.gov/view/dot/49398.
ROSA P serves as an archival repository of USDOT-published products including scientific
findings, journal articles, guidelines, recommendations, or other information authored or co-authored by
USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to
ensure public access to scientific information.
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