While passing another car, what should you do if you started to pass but need to stop?

When you find yourself in a situation where you have started to pass another vehicle but realize that stopping is necessary, slowing down and moving into the right lane behind the vehicle being passed is the safest option. This action allows you to maintain control of your vehicle while ensuring the safety of both yourself and other road users.

By slowing down and safely merging back behind the vehicle, you reduce the risk of a collision that could occur if you attempted to speed up or brake suddenly. Speeding up to complete the pass quickly might lead to an unsafe maneuver, especially if you misjudge the distance or speed of oncoming traffic. Slamming on your brakes could create a hazardous situation as well, possibly startling the drivers behind you and increasing the risk of an accident. Remaining in the left lane until passing an intersection is not advisable since the goal should be to complete the maneuver safely without lingering in a position that could endanger you or others. Thus, the best approach is to slow down and merge back into your lane appropriately.