What should you do if you are on a two-lane road with a speed limit of 25 mph or higher and see a sanitation vehicle parked?

In this scenario, the appropriate action is to slow down to 20 mph below the posted speed limit. This is important for ensuring the safety of both yourself and the workers around the sanitation vehicle. By reducing your speed, you decrease the likelihood of an accident as you pass by a potentially active work area.

When encountering sanitation vehicles, drivers are required to exercise caution. These vehicles often have workers outside who may be operating in the vicinity and might not be easily visible. Slowing down significantly provides you with more time to react to any sudden movements from the sanitation crew or any unexpected obstacles.

Moving into the other lane (when safe to do so) can be an alternative option in some contexts, particularly if there is a clear and unobstructed lane next to you, but it is not as universally applicable as simply slowing down. Stopping entirely may not be necessary or practical, especially if you're in a situation where traffic flow needs to be maintained. Speeding past without stopping would be violating safe driving practices and could lead to accidents.