Final answer:
The 'school speed limit 15 when children are present' sign mandates a lower speed limit near schools to improve pedestrian safety, particularly for children coming to or leaving campus. Traffic signals complement these signs by forcing vehicles to stop, providing safe crossing points for pedestrians.
Step-by-step explanation:
The sign indicating a 'school speed limit 15 when children are present' is designed to enhance pedestrian safety around schools. Such a sign requires drivers to slow down to 15 mph in the vicinity of a school when children are present, typically during school hours or when children are arriving or leaving the campus.
Lowering the speed limit in these areas is crucial because children may be crossing the street and the normal speed limits may not provide enough reaction time for drivers should a child unexpectedly enter the roadway.
Traffic signals often supplement these speed limit signs, as they help to further manage vehicle speeds and create safe opportunities for pedestrians to cross.
With the installation of a traffic signal at a busy intersection, vehicles are forced to come to a halt, giving children safe passage across roads that would otherwise be hazardous due to drivers ignoring the posted speed limits and not paying careful at