This often takes to form of special signage at freeway off-ramps to discourage drivers from going the wrong way.
Lisi de Bourbon, a department spokeswoman, said ways to discourage drivers from using the road would be explored.
European planners work hard to discourage drivers, cars and parking.
They also painted angled stripes on the road's shoulders in a do-it-yourself project to discourage drivers from using them.
How about this lot: Discourage drivers of private motor vehicles from entering or moving within London.
It also discourages drivers and owner-operators from agreeing to move "cheap freight."
Put tolls on the East River Bridges to discourage drivers from coming into the city.
Excess is used to discourage drivers from making insurance claims for small damage.
They separate the road from the roadside, discouraging drivers from parking or driving on sidewalks and lawns.
This discourages drivers from speeding or impeding the flow of traffic.