What is the minimum dimension of a chaflan at the corner of two intersecting RROWs?

The minimum dimension of a chaflan at the corner of two intersecting right-of-way roads (RROWs) is determined by road safety and design standards, which seek to facilitate smooth vehicular movement and improve visibility at intersections. A chaflan, or rounding off of the corner, is essential for better turning radii for vehicles, especially larger ones like trucks and buses.

In many road design guidelines, a minimum dimension of 4 meters is specified to ensure that vehicles can navigate the turn safely without encroaching on conflicting traffic or pedestrians. This dimension helps enhance safety by reducing sharp angles and providing a more gradual transition from one road to another, thus minimizing the risk of accidents.

Other dimensions mentioned in the choices could exceed common specifications, but specific policies from various municipalities or governing bodies might reinforce the 4-meter guideline as a standard requirement for chaflans at road intersections. This reflects engineering best practices aimed at balancing safety and functionality in urban planning.