Signs

Cutting off corners of diamond-shaped signs when mounted on a barrier wall (Practice)

Kentucky Transportation Cabinet has cut the corners of signs mounted on barrier walls in a few situations over the years. This practice was certainly not desirable, but necessary in order to dual-moun… More

Exploring the Effects of the Location of the Lane-End Sign and Traffic Volume on Multistage Lane-Changing Behaviors in Work Zone Areas: A Driving Simulator-Based Study (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

The lane-changing behavior in work zone areas has special features than a regular lane change as the former is usually compulsively motivated involving complicated cognitive processes with drivers’ …More

Contractor identification sign in work zones (Practice)

Washington DOT allows the use of contractor identification signs on projects and has developed criteria for their use. There are two signs that are used and the criteria can be viewed at the following… More

State Shows Off New Signs Warning Drivers to Give Room to Emergency Vehicles (Publication)

Resource Type: News and Other Non-research Articles

As a part of the awareness campaign for the "move over" law, Vermont Agency of Transportation will display 12 large white and yellow signs on interstate highways to warn drivers to move over or slow …More

A Study of the Visibility and Effectiveness of Fluorescent Retroreflective Traffic Control Signing in Work Zone Applications (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

Road works present a special challenge to both the driver and the traffic engineer. Work zone accident statistics attest to the need for safety improvements. One way traffic engineers have attempted t…More

Evaluation of Early Merge Static Work Zone Signing in Oklahoma (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

This research examined the safety and operational benefits of having traffic merge early into the open lane prior to a work zone merge area. A 2007 law in Oklahoma adopted the use of additional “STA…More

Innovative Traffic Control Devices for Improving Safety at Rural Short-Term Maintenance Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

The Texas Department of Transportation (TxDOT) and the Federal Highway Administration (FHWA) sponsored a Texas Transportation Institute (TTI) research project to determine if innovative traffic contro…More

Senate GOP Looks to Ease Federal Mandate on Reflective Road Signs (Publication)

Resource Type: News and Other Non-research Articles

Tennessee Republican Senators Bob Corker and Lamar Alexander introduced a bill, S. 1216, which would waive the requirement for all states to install more reflective road signs by 2018. Their bill is m…More

Contractor identification sign in work zones (Practice)

Texas DOT requires this type of signing on all construction projects and maintenance projects that are let by TxDOT, except on projects where this is not practical such as a districtwide contract for … More

Contractor identification sign in work zones (Practice)

Nevada DOT has used signs in the past that indicated the contractor and other entities with input to the project. Original sign designs listed contractor name, DOT, and other entities (FHWA, city, cou… More

Signing for the end of work zone (Practice)

Illinois uses "END CONSTRUCTION" signs at the ends of work zones. If the location is also the end of a special work zone speed limit, then the "END CONSTRUCTION" sign is replaced with an "END WORK ZON… More

New Law Gets Rid of Construction Signs (Publication)

Resource Type: News and Other Non-research Articles

Louisiana governor has signed into law a bill (House Bill 764) to do away with the signs that describe the cost and scheduled completion date of highway construction. The change is a cost-cutting move…More

Signing for the end of work zone (Practice)

Georgia uses the "End Road Work" sign at the end of the work zone. If the speed limit has been reduced, then a speed limit sign is posted approximately 500 feet past the work zone to raise the speed l… More

Flashing lights on speed limit signs (Practice)

Illinois DOT uses flashing lights on speed limit signs. This is part of special provisions with penalties to contractors that fail to use. (However, penalties have not been enforced.) Speed limit is 4… More

Road Sign Vision and Driver Behaviour in Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

The effectiveness of roadwork signs on drivers’ safety is a poorly investigated topic. The present study examined visual fixations of 29 participants to work zone signs, while driving 27 km along …More

More Business Signs OK’d in Road Construction Zones (Publication)

Resource Type: News and Other Non-research Articles

In recognition that businesses in construction zones are suffering, the Yuma city of Arizona has adopted a policy allowing them to place additional temporary signage to attract customers. This is an e…More

Maintenance of Signs and Sign Supports: A Guide for Local Highway and Street Maintenance Personnel (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.

This handbook is intended to help local agency maintenance workers ensure their agency's signs are maintained to meet the needs of the road user. The following topics are covered: a description of sig…More

Handbook of Recommended Information Sign Symbols for Canada (Publication)

Resource Type: Manuals, Policies, Guidelines, and Handbooks, etc.

TAC’s Handbook was developed to encourage uniformity in symbol usage throughout Canada. The document meets the needs of many Canadian jurisdictions in that it serves as a reference guide on informat…More

Crash Tests of Work Zone Traffic Control Devices (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

Full-scale vehicle crash tests were used to evaluate performance of typical work zone traffic control devices. Modified test procedures and evaluation criteria from National Cooperative Highway Resear…More

Colorado Department of Transportation S-Standard Plans and Miscellaneous Project Details (Publication)

Resource Type: Standard Plans

The S-Standard Plans are details used in the design and construction of CDOT projects. They contain standardized details for common safety items such as delineators, signs, sign supports, traffic sign…More

Impact of Work Zone Signage on Driver Speeding Behavior: A Driving Simulator Study (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

Speeding in a work zone needs to be tackled effectively to enhance work zone safety. This study evaluates the influence of three different work zone signs – speed photo enforced signs, dynamic speed…More

Studies to Improve the Management of Regulatory Speed Limits in Texas Work Zones (Publication)

Resource Type: Books, Reports, Papers, and Research Articles

This report describes the methodology and results of analyses performed to (1) improve existing procedures on establishing and managing work zone speed limits, and (2) evaluate new technologies and st…More

Indiana Department of Transportation Standard Drawings (Publication)

Resource Type: Standard Plans

Standard Drawings are a complete set of drawings, available for both English and Metric versions. Section 600 is for Incidental Construction and Section 800 is for Traffic Control Devices & Lighti…More

Contractor identification sign in work zones (Practice)

Wyoming combines the name of the contractor with the END CONSTRUCTION sign. More

Signing for the end of work zone (Practice)

See Iowa's Standard Road Plans below for the signing for the end of work zone: Standard Road Plan 1 Standard Road Plan 2 Standard Road Plan 3 Standard Road Plan 4 More

Colorado Supplement to Standard Highway Signs (Publication)

Resource Type: Specifications & Special Provisions

This web page provides listing and fabrication details of highway signs that are used by the state of Colorado and are supplemental to the Federal Highway Administration's standard highway signs.More