A four-arm uncontrolled un-signaled urban intersection of both-way traffic is illustrated in the figure. Vehicles approaching the intersection from the directions A, B, C, and D can move to either left, right, or continue in straight direction. No U-turn is allowed. In the given situation, the maximum number of vehicular crossing conflict points for this intersection is _________ (answer in integer)
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In urban traffic design, it’s important to minimize conflict points to reduce accidents and improve traffic flow. Higher conflict points often lead to more complex signalization or control systems.
In an intersection, vehicular conflict points occur when two or more vehicles are moving along conflicting paths. For a four-arm uncontrolled intersection, vehicles can either turn left, turn right, or continue straight.
Each direction has the possibility of conflict with other directions in various ways, either through crossing or merging of paths.
For each approach (A, B, C, D), there are the following conflict points:
A to B: Vehicles going straight and vehicles turning left from B = 1 conflict point.
A to C: Vehicles going straight and vehicles turning left from C = 1 conflict point.
B to C: Vehicles going straight and vehicles turning left from C = 1 conflict point.
B to D: Vehicles going straight and vehicles turning left from D = 1 conflict point.
C to D: Vehicles going straight and vehicles turning left from D = 1 conflict point.
Vehicles turning left from A, B, C, and D can cross paths with each other.
In total, the number of conflict points is the maximum number of crossing points where these paths intersect.
Conclusion: The maximum number of vehicular crossing conflict points is 16.
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