When to Measure
Vertical clearance may change with milling operations, overlays,
and new construction. All construction or maintenance activities
which may affect the vertical clearance of an overhead structure should
be coordinated with the district oversize/overweight permit coordinator
in advance to ensure that accurate and current records are maintained.
Any condition that could result in a change to the vertical
clearance, such as an overlay or reconstruction of the roadway,
requires new measurements.