Caltrans has used radar speed trailers in work zones and has experimented with other drone-type speed advisory devices. The devices have been effective, especially on high-speed interstate freeways … [Read more...] about Use of drone radar and safety intrusion alarms in work zones
California
Temporary Movable (“Zipper”) Barrier systems in work zones
California has used the "zipper" barrier a few times. However, no standard has yet been developed for its use. … [Read more...] about Temporary Movable (“Zipper”) Barrier systems in work zones
Application of types of temporary/removable pavement marking material and special linestriping material
In California, the Standard Special Provision for Temporary Striping includes provisions for temporary traffic stripe (paint) and for tape. If the line is to be moved during the course of … [Read more...] about Application of types of temporary/removable pavement marking material and special linestriping material
Permit requirements to install/erect temporary traffic control warning signs and other temporary traffic control devices along roadways
California DOT requires anyone who wants to perform work or traffic control on a state highway (if not already under contract) to obtain an encroachment permit. … [Read more...] about Permit requirements to install/erect temporary traffic control warning signs and other temporary traffic control devices along roadways
Penalty for failing to promptly open lanes beyond the lane closure limit
In California, the calculated amount (penalty) deducted from the contractor varies from contract to contract. It is based on the existing capacity of the freeway, the number of lanes closed, and the … [Read more...] about Penalty for failing to promptly open lanes beyond the lane closure limit
Flagger training and certification requirements
From State of California Department of Transportation Standard Specifications: "12-4.02C(9)(a)(iv) Quality Assurance Flaggers must be at least 18 years of age and maintain a valid government … [Read more...] about Flagger training and certification requirements