Final answer:
The purpose of diverting traffic around work sites is to maintain safety for both motorists and road workers. Wires before tollbooths alert of approaching vehicles, while the installation of traffic signals is critical for pedestrian safety and to handle the increased flow of traffic.
Step-by-step explanation:
The purpose of diverting traffic from its normal path is to safely guide motorists around a work site, ensuring the safety of both the workers and the drivers. This is often done using tactical setups such as cones, barriers, and sometimes more sophisticated systems like sensors or wires embedded in the road, especially around tollbooth stations. The wire before tollbooths, while not particularly designed to divert traffic, serves to alert the toll system of an approaching vehicle.
Pedestrian safety is also a crucial concern in areas with heavy traffic and frequent crossing, necessitating the use of traffic signals. These signals allow for safer pedestrian crossing and help manage increased vehicle flow, for example, from nearby commercial developments or significant events rerouting through intersections. The installation of traffic signals can thus be predicated on several factors, including increased traffic volumes, pedestrian safety, and a higher incidence of accidents.