~ 2-span (25' - 50') cored slab bridge with precast NJ shape barrier rail with cast in place barrier rail transition, and a 6% superelevation.
~ The bridge is in a location with a low sag vertical curve with potential for overtopping.
~ Minimal approach roadway work was appropriate for the scope of the project
~ Demonstrated a reasonable balance between bridge length and maintaining the grade.
~ Demonstrated that approaches do not need to be widened for bridge with large shoulders.
~ Bridge is a good example of a situation where a single span box-beam superstructure would have been appropriate.
~ The new process document will include details on how the Structure Design Unit will interact with Hydraulics in order to eliminate undesirable span arrangements.
~ Develop guidelines to determine situations where widening roadway approaches is appropriate,
~ Roadway Design and Structure Design Units should not design bridges for more than 2 lanes if the approach roadway is only two lanes,
~ In some situations allow shorter approach slabs in lieu of the current 25'-0". A suggestion is to base the approach slab length on the design ADT.
