How many directions of traffic do roads that are generally divided into two carriageways by a central reservation have?
Highways and motorways
Explanation
**Roads divided into two carriageways by a median** generally have **two directions of traffic**. This means that vehicles can move in opposite directions, each on its own carriageway.
- **Direction of traffic** refers to the direction in which vehicles move. On a two-way road, there is one lane for going and another for returning, allowing traffic in both directions.
- **Two-way roads** are designed for vehicles to travel in opposite directions, each in its corresponding lane. This is illustrated in the image of a road with traffic in both directions:
- On some roads, **additional lanes** can be added to facilitate traffic flow, but this does not change the fact that the road still has two directions of traffic.
Therefore, roads with a median separating two carriageways allow traffic in two directions, one on each carriageway.
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