Arrow continues to flash and direct traffic to the right. Worker loads sign as arrow continues to flash to the right. Changeable message signs are coming into vogue in work zones. More study is needed on effective messages and their use. The Type I barricade has a bag of sand on the top for stability.
Sand bags can penetrate the windshield of an impacting car and cause injury or death.
The soil embankment from the excavation is piled in the median between opposing traffic lanes creating a hazard to a motorist who enters the median during an emergency maneuver. The same excavation undermines the pavement, creating a potential for pavement collapse.