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Devices

3 articles on devices.

Sep 17, 2026

Sign Stands, Sandbags and Ballast in Work Zones

Ballast is the most improvised item in a traffic control yard and one of the few that can turn a device into a projectile. What the MUTCD says about ballasting cones, drums and barricades, why more is not better, and what a yard should standardise.

Aug 23, 2026

Temporary Rumble Strips in Work Zones: What They Do and When They Help

What temporary rumble strips are for, where they go in the advance warning area, how removable and milled versions differ, the maintenance and noise problems nobody mentions, and an honest read on the evidence.

Aug 2, 2026

Channelizing Devices: Cones, Drums, Tubular Markers, and Vertical Panels

The devices that make up most of a traffic control inventory, what each one is actually for, why they are designed to be knocked over, and how retroreflectivity quietly decides whether any of them work at night.