An operator may not, except momentarily to pick up or discharge a passenger, stand or park an occupied or unoccupied vehicle within feet on the approach to a flashing signal, stop sign, yield sign or traffic control signal located at the side of a roadway.

"30 feet"

Explanation:

According to the transportation code in certain States in the U.S., an operator is not allowed to park his vehicle within "30 feet" of a flashing signal or stop sign or yield sign, or traffic control signal at the side of the road.

This is so the operator does not obstruct other road users from seeing the signs.

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