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National Work Zone Safety Information Clearinghouse

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You are here: Home / All entries for Traffic Control Devices / Crash Cushions

Crash Cushions

Featured Items:

Portable Positive Protection: A Guide for Short Duration and Short Term Work Zones (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
This guideline covers various types of positive protection devices that can be easily placed and moved for short duration and short term work operations, especially compared with traditional portable …More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

Caltran's policy for maintenance operations is as follows: When closing a lane, a barrier vehicle or a shadow vehicle shall be used for the installation of the signs and the FAS if they can be placed … More

A Driving Simulator Study: Evaluation of Vehicle Mounted Attenuator Markings in Work Zones During Different Times of the Day (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
This report presents a study of driver perceptions using a driving simulator. The evaluation required one hundred and twenty participants from different age groups to drive through virtual highway wor…More

Crash attenuators in work zones (Practice)

MnDOT has a Qualified Products List (QPL) for temporary crash attenuators at: http://www.dot.state.mn.us/trafficeng/qpl/WorkZone.pdf. Pre-qualifications for temporary crash attenuators are: A New Prod… More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

Minnesota DOT does not require the use of truck-mounted attenuator (TMA) equipped vehicles for the installation of temporary traffic control devices. However, Mn/DOT sometimes uses mobile lane closure… More

New traffic control methods for mobile work zones and their effectiveness in reducing crashes (Practice)

California DOT has not introduced any new traffic control methods recently. However, the maintenance department does require additional protection over what is recommended in the MUTCD. California req… More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

Illinois requires that work zone lane closures be set up in the direction of traffic flow. Vehicles used in this process may work out of the closed lane. Work zone take-down is done in the reverse dir… More

Sand barrels in work zones (Practice)

Typically, Virginia recommends a conservative design (NCHRP 350 TL-3) if there is adequate clearance, usually consisting of twelve barrels for a narrow hazard (see link below for an example array). If… More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

Virginia requires the use of a shadow vehicle when installing and removing lane closure traffic control. When the posted speed limit is 45 mph or greater on roadways with four or more travel lanes, th… More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

New Hampshire does not require a truck-mounted attenuator (TMA) to protect workers or work vehicles during lane closure set-ups and removals. NHDOT has included some TMA requirements in project-specif… More

Sand barrels in work zones (Practice)

California's standards for sand barrels in work zones are in the state's T-series of Standard Plans (plans T1A, T1B, and T2). The 2006 version of the Standard Plans is on the web site below. The plans… More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

Michigan does not require the work vehicle to have a TMA. It does not require truck-mounted attenuators (TMAs) or a shadow vehicle to be used when setting up a lane closure. In its TMA guidelines, Mic… More

Requirements for work or shadow vehicles to have Truck-Mounted Attenuator (TMA) (Practice)

When a shadow vehicle is used, TxDOT requires the vehicle to be equipped with a truck-mounted attenuator. Shadow vehicles are required in many situations including mobile operations and short-term fre… More

Safety Analysis of Truck Mounted Attenuators in Mobile Work Zones Using Differential Analysis (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
While talking about road maintenance and safety in mobile work zones, it is unavoidable to not talk about truck mounted attenuators (TMAs). TMAs are eminent in work zones as they are mainly inte…More

Sand barrels in work zones (Practice)

Oregon's Traffic Drawings TM 800 - Temp Traffic Control (See Temporary Impact Attenuators) contain the necessary information concerning the use of sand barrels in work zones. From the drawings, inform… More

Portable Positive Protection: A Guide for Short Duration and Short Term Work Zones

September 2015 PDF Version [3.8 MB] Developed by ATSSA for the FHWA Work Zone Safety Grant Program Note: This document cites specific products solely to illustrate the concept of portable… More

Analysis of Expected Crash Reduction Benefits and Costs of Truck-Mounted Attenuator Use in Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles
A truck-mounted attenuator (TMA) is a device that attaches to the back of a work truck to help protect work crews and the traveling public from the severe consequences of rear-end crashes between moto…More

Protection for bridge ends or other fixed objects in two-lane two-way operations (Practice)

Iowa DOT protects the off-end of bridges in its two-lane two-way operations work zones by temporarily placing the appropriate metal beam guardrail treatments. If a metal beam rail does not work, crews… More

Colorado DOT and Partners to Unveil Self-Driving Work Zone Vehicle (Publication)

Resource Type: News and Other Non-research Articles
Royal Truck & Equipment, a US manufacturer of truck mounted attenuator (TMA)  trucks, is to unveil the Colorado Department of Transportation autonomous attenuator truck, along with partners at C…More

CDOT Tests Self-Driving Work Zone Vehicle: Video (Publication)

Resource Type: News and Other Non-research Articles
The Colorado Department of Transportation (CDOT) unveiled its Autonomous Impact Protection Vehicle (AIPV), a driverless crash cushion truck designed to advance safety for roadway maintenance crews. CD…More

Sand barrels in work zones (Practice)

See the links below for details concerning Maryland's procedures for the use of sand barrels in work zones.Site Conditions and RecommendationsLayout ConfigurationTypical Design LayoutHazard More

CDOT Purchases the World’s First Automated Self-Driving Construction Vehicle (Publication)

Resource Type: News and Other Non-research Articles
When Robert Roy was helping to create the world's first self-driving construction truck, he traveled across the country and talked to people in the construction industry. He learned that drivers of cr…More

Sand barrels in work zones (Practice)

Florida primarily uses redirective crash cushions for work zone applications. Sand barrels have limited applications (see Design Standards notes for criteria) in Florida. The state's Design Standards … More

Portable Positive Protection: A Guide for Short Duration and Short Term Work Zones (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
This guideline covers various types of positive protection devices that can be easily placed and moved for short duration and short term work operations, especially compared with traditional portable …More

Shadow Vehicles for Work Zones Training Module (Training)

This training module provides criteria for the use of shadow vehicles and Truck Mounted Attenuators (TMAs) in work zones. Module materials are based on the product "Field Guide for the Use and Placeme… More

Sand barrels in work zones (Practice)

Kansas uses 12 barrels of sand at the speed of 60 mph. The state uses 14 barrels at 65 mph and 16 barrels at 70 mph. The configurations of barrels are different at different speeds. See the web site b… More

Can Self-Driving Equipment Make Work Zones Safer? (Publication)

Resource Type: News and Other Non-research Articles
Warning signs, barriers, and truck-mounted attenuators (TMA) can reduce some of the risks workers face in highway work zones, but they cannot eliminate the hazards.  This past summer, Colorado Depar…More
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