Both Programs are federally funded but have different eligibility and local participation requirements.
Must meet low impact criteria such as no geometry or grade changes, low environmental impacts and off-site detours are accepted by local entities. LIBPs are completed with expedited delivery by means of prefabricated bridge components. Local participation requires agreeing to an off-site detour up to 12 months in duration (typical closure being about 6 months and maintaining local roads as needed during construction.
Follow a traditional federal replacement schedule with local fiscal participation agreed to and disbursed up front before the project begins. These projects do not require off-site detours or low impact criteria allowing for the more design intensive local bridges to be replaced.