Regulatory Construction Speed Limit Signs

R2-1 SPEED LIMIT signs shall be used for signing construction speed zones.
Speed limit signs shall be erected only for the limits of the section of roadway where speed reduction is necessary for the safe operation of traffic and protection of construction personnel. In most cases, this will involve only a short section of roadway where work is in progress, but in some cases, it will involve partially completed sections extending for some distance.
It is imperative that proper speed limits be posted in construction work zones. Improperly posted work zone speed limits adversely affect the flow of traffic by:
  • encouraging driver disrespect for all speed limits
  • endangering the driver who observes an unreasonably low posted speed limit.
The reduced speed limits are effective only within the limits where signs are erected, even though the entire length of the project may be covered by Transportation Commission minute order. Figure 2-3 shows typical signing of a construction speed zone.
Typical construction speed zone. (click in image to see full-size image)
Figure 2-3. Typical construction speed zone.