Final answer:
Vehicles can cross broken yellow lines to pass or turn safely. Traffic signals improve pedestrian safety and ensure compliance with speed limits. In high-risk intersections, traffic signals can significantly reduce accidents and enhance safety for all road users.
Step-by-step explanation:
Yes, vehicles can cross the broken yellow line to pass or turn if it is safe to do so. This action should always be taken with caution, considering the traffic conditions and adherence to traffic laws. When it comes to pedestrian safety, the installation of a traffic signal is often beneficial. In areas where pedestrians, including students, cross roads regularly, a traffic signal can provide them with a safe time to cross, reducing the need to dodge traffic.
Furthermore, traffic signals can positively impact vehicle behavior by forcing drivers to slow down and comply with the speed limit. This is particularly important in intersections where vehicles tend to speed, exacerbating safety risks. A cause-and-effect of installing a traffic signal is evident in situations where accidents and close calls are common due to high speeds and lack of pedestrian crossing aids.