The approaches from the north and south comprise three lanes; 2.8m left lane, 3.5m middle lane and 3.0m right lane. Approach gradient is 2% uphill. All other approaches are level with two 3.2m lanes.
Design signal timing for this intersection using Webster’s method. (Note: follow the ten steps proposed in Webster method. Make reasonable assumptions where necessary and state them clearly).
Provide signal phasing, signal cycle and signal timing diagrams.
Provide a discussion about the performance of the intersection.
Provide suggestions to improve the intersection performances, if needed.