How much following time is advised for a passenger car in wet conditions?

In wet conditions, it is advised to maintain a following time of 4 seconds for a passenger car. This longer following time accounts for the reduced traction and braking capabilities that vehicles experience in wet conditions. When the road is slippery, it takes longer to stop, and drivers need more time to react to the actions of the vehicle in front of them, which can be unpredictable in inclement weather. The 4-second rule allows for a safer distance to account for potential hydroplaning and other hazards that wet conditions can bring. By increasing the following time, drivers can better ensure they have enough space to safely stop and avoid collisions.