Washington State Department of Licensing Knowledge Test

What is the required depth of tire tread in Washington State?

1. 1/32 inches

2. 2/32 inches

3. 4/32 inches

4. 6/32 inches

The correct answer is: 2/32 inches

In Washington State, the required minimum depth of tire tread is 2/32 of an inch. This standard is critical for ensuring adequate traction and safety on the road, especially in wet or slippery conditions where deeper tread can help prevent hydroplaning and maintain control of the vehicle. The measure of tire tread depth is an important aspect of vehicle maintenance and overall road safety, as insufficient tread can significantly increase the risk of accidents and reduce a driver's ability to navigate safely during adverse weather conditions. The other options highlight different depths that are either too shallow or commonly regarded as inadequate for safe driving in Washington State. Having tread depths below the minimum requirement can lead to decreased performance, especially in terms of braking and steering responsiveness.