Final answer:
Regardless of whether other vehicles are visible, you must signal at least 100 feet before turning at an intersection in Washington State to ensure safety and compliance with traffic laws.
Step-by-step explanation:
When you are going to turn at an intersection in Washington State, you are required to signal even if no other vehicles are around. The correct answer to whether you still have to signal is: Yes, you must signal for at least 100 feet before you turn. Regardless of whether other vehicles are visible, you must signal at least 100 feet before turning at an intersection in Washington State to ensure safety and compliance with traffic laws.
This requirement is in place to ensure both vehicular and pedestrian safety, and to reduce the likelihood of traffic accidents, which can happen even when other vehicles do not seem to be present. Moreover, traffic signals help manage increased traffic flow and promote safety near campuses and growing business areas. It is important to always adhere to traffic laws for the safety of all road users.