Final answer:
Cyclists must obey the same traffic rules as car drivers for safety and predictability in traffic flow. Non-adherence by cyclists can endanger themselves and others. Traffic signals exist to control vehicle speed and ensure pedestrian and cyclist safety.
Step-by-step explanation:
Cyclists are required to obey the same traffic rules as car drivers, including stopping at stop signs and red lights. The reason many cyclists do not always adhere to these rules may vary; some do it to maintain momentum and avoid the effort of restarting, while others may misjudge the safety of proceeding. Regardless, for safety reasons, it is crucial for cyclists to obey traffic laws to prevent accidents and ensure the flow of traffic is predictable for all road users.
Pedestrian safety is also a significant reason why adherence to traffic signals is essential. Without obeying signals, both pedestrians and cyclists are at greater risk. For vehicles, traffic signals help maintain the correct speed limit and provide safe crossing points for pedestrians and cyclists.
The colour of one's car does not determine the speed one is travelling at, and it is not safe to cross the road outside pedestrian crossings. Traffic safety measures like signals are installed to manage traffic flow and reduce accidents, as indicated by increased accidents and risks at intersections without proper signals.