InternationalBridgeMotorists driving on the International Bridge may see fire equipment and staff on Tuesday.  Testing in the form of a safety exercise is expected to happen around 8:15 a.m. and last until mid-morning.  The testing will determine the feasibility of using a ladder truck to help any people who need assistance in getting down from the higher parts of the bridge arch.  One lane of traffic will be maintained under flag control during the tests.