Posts Categorized: Technical Articles

Free Retroreflectivity Kit

Free Retroreflective Sign Test Kit

LHTAC Retroreflective Sign Test Kit

 

LHTAC is providing one FREE Retroreflectivity Sign Testing Kit to each Local Highway Jurisdiction. These kits are intended to serve as an affordable alternative to purchasing a costly retroreflectometer. Sign kits can be used to assess the retroreflectivity of signs in your jurisdiction to insure compliance with the minimum levels established in the current version of the Manual for Uniform Traffic Control Devices (MUTCD).

If you would like to receive a free kit or if you have questions please contact Kevin Kuther (kkuther@lhtac.org).

Accessible Shared Streets: Notable Practices and Considerations for Accommodating Pedestrians with Vision Disabilities

FHWA has just published a new resource titled Accessible Shared Streets: Notable Practices and Considerations for Accommodating Pedestrians with Vision Disabilities.

This document captures the national state of the practice for accommodating pedestrians with vision disabilities on shared streets and helps State and local partners meet Americans with Disabilities Act (ADA) obligations. The study process included engagement with the U.S. Access Board, State departments of transportation, National Association of City Transportation Officials (NACTO), and FHWA Division Offices and is a model for engaging people with disabilities in the planning process.

 

Problems with Crack Sealant – Motorcyclists at Peril

By Lane Triplett, Idaho Coalition for Motorcycle Safety

Since the use of highway crack sealant/filler first began, motorcyclists have lived in fear. Warm weather causes the substance used in this process to become pliant and slick. Due to the hazards of this slickness, and the general crooked ‘snake-like’ nature of filled cracks, motorcyclists have dubbed them “Tar Snakes”.  In even the slightest of corners, motorcycles can slide until their wheels make contact with pavement. This is, of course, an unnerving feeling for the rider.  In a hard cornering situation, the results can be devastating for the motorcyclist. When a motorcycle in a leaning stance in a corner contacts a tar snake, it starts to lose traction which causes the motorcycle to lean even closer to the pavement. After the motorcycle crosses the sealant and makes contact with pavement, the resulting traction gain tends to stand the motorcycle upright. The force of this action can flip a motorcycle instantly.

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3D Engineered Models: Schedule, Cost and Post-Production

Every Day Counts

April’s innovation of the month is 3D Engineered Models, a basic building block of today’s digital highway that allows for faster, more accurate and more efficient planning and construction.

After encouraging the adoption of 3D Engineered Models in the second round of Every Day Counts, the Federal Highway Administration is continuing to promote the technology in EDC3 to help the transportation community reap even more benefits. (more…)