Blog / PCMS

PCMS

2 articles on pcms.

Equipment and yards

Portable Changeable Message Sign Placement and Visibility: Where the Trailer Goes and Why

A portable changeable message sign only works if drivers can read it in time and the trailer itself is not a hazard. Here is what the MUTCD says about visibility distance, letter height, mounting height, lateral placement and spacing between signs, and what a traffic control company should check on delivery.

Oct 10, 2026 · 7 min read

Equipment and yards

Portable Changeable Message Signs: What to Display, and What Not To

A portable message sign is the one device in the zone whose wording your crew writes. Here is what the MUTCD 11th Edition asks of PCMS messages, placement and maintenance, why most bad messages fail the same three ways, and how to run a message board fleet without losing track of it.

Sep 23, 2026 · 14 min read