What is the recommended gap in traffic when making a left turn from a parking lot to the left?

When making a left turn from a parking lot onto a roadway, it's crucial to ensure there is enough gap in traffic to complete the turn safely without interrupting the flow of vehicles. The recommended gap of 4 seconds is based on providing adequate time to assess incoming traffic, execute the turn, and allow for any potential delays or adjustments that may be necessary.

A gap of 4 seconds typically offers a good balance between safety and responsiveness. It allows sufficient time to observe oncoming vehicles, judge their distance and speed, and make a confident turn into the traffic lane. This time frame helps in minimizing risks associated with turning into oncoming traffic, which can be particularly important in fast-moving road conditions or in urban environments where vehicles may approach more quickly than anticipated.

This 4-second guideline also takes into consideration the varying speeds of vehicles on the road and helps the driver make more informed decisions while leaving the lot.