BRIDGE CLEARANCES - TOM UGLYS BRIDGE Eastern Carriageway: Nine spans of which the northern and two southernmost are unsuitable for navigation, the remaining spans have a horizontal clearance of 70m and maximum clearance height 6.75m. Western Carriageway: Nine spans, six main spans with horizontal clearance 66m with two on the south and one on the north of 26m. Maximum clearance height 5m reduced to 4m by travelling gantry when in use, which at night is marked by red lights.