Why is it important to look both ways at a T-intersection?

At a T-intersection, looking both ways is crucial primarily to check for oncoming traffic before proceeding. This is because T-intersections often involve a driver needing to merge with or cross the path of traffic flowing along the main road. Failing to check for oncoming vehicles could lead to a collision with traffic that has the right-of-way, as the driver might not see vehicles that are approaching quickly. Ensuring safety in such scenarios means being aware of all vehicles that might enter the intersection at the same time.

While checking for pedestrians is important, ensuring there are no parked vehicles nearby, or considering the need for a U-turn are less immediate concerns in terms of safety and yielding to traffic. The primary risk at a T-intersection lies in the interaction with fast-moving vehicles on the main road, which is why assessing oncoming traffic is the most critical element.