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 …MoreCrash Cushions
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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…MoreCrash 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
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…MoreProtection 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
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…MoreColorado 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 Co…MoreSand 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
Arizona Department of Transportation Temporary Traffic Control Design Guidelines (Publication)
Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.
This document is intended to provide guidelines relating to the design of temporary traffic control for state highway construction, maintenance related operations, utility operations, and incident man…MoreCDOT 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…MoreSand 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
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
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 …MoreSand 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
Sand Barrels in Work Zones (Practice)
WSDOT includes information on inertial barrier systems in Washington's standard plan documents. See "C-90.10-00 Impact Attenuator Inertial Barrier Configurations" on the website below for details.
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