Laboratory-accelerated weathering tests are used instead of outdoor weathering tests in specifications for products intended for long-term outdoor use because they provide fast results. These … [Read more...] about Laboratory-Accelerated Versus Outdoor Weathering for Retroreflective Sheeting Specifications
Traffic Signs
Fluorescent Orange Sign Sheeting Evaluation by a State DOT
The following paper describes the first phase of the Arizona Department of Transportation (ADOT) fluorescent orange sign sheeting evaluation. The general goal of the evaluation was to develop a … [Read more...] about Fluorescent Orange Sign Sheeting Evaluation by a State DOT
Traffic Sign RetroReflective Sheeting Identification Guide
This document is intended to help identify sign sheeting materials for rigid signs and their common specification designations. It is not a qualified product list. FHWA does not endorse or approve … [Read more...] about Traffic Sign RetroReflective Sheeting Identification Guide
Assessment of Advanced Warning Signs for Flagging Operations
The Virginia Department of Transportation (VDOT) and several other state departments of transportation have expressed interest in modifying the advanced warning sign for work zone flagging operations. … [Read more...] about Assessment of Advanced Warning Signs for Flagging Operations
Redesign and Evaluation of Selected Work Zone Sign Symbols
A study of traffic sign symbols was completed recently at the FHWA Turner-Fairbank Highway Research Center in McLean, Virginia. As part of this research, four work zone traffic control warning signs ( … [Read more...] about Redesign and Evaluation of Selected Work Zone Sign Symbols
Safety Effects of Fluorescent Yellow Warning Signs at Hazardous Sites in Daylight
Yellow warning signs are an important and abundant type of traffic control device. Improving warning signs could be a cost-effective countermeasure at hazardous locations. The use of fluorescent … [Read more...] about Safety Effects of Fluorescent Yellow Warning Signs at Hazardous Sites in Daylight