The National Bridge Inspection Standards (NBIS) define that the state’s transportation department is responsible for establishing policies and procedures, completing quality assurance and quality control, and preparation and maintenance of the bridge inventory. The transportation department is also responsible for ensuring the completion of bridge inspections, reports, load ratings, and other requirements as established by the NBIS. MDOT’s Operations Field Services Division and Design Division share the responsibilities for maintaining compliance with the NBIS.
- Safety Inspection The safety inspection program is managed within the Bridge Field Services Section of the Operations Field Services Division. The program ensures compliance with the National Bridge Inspection Standards (NBIS) through comprehensive performance of inspection timeliness verifications, annual FHWA NBIS Metric evaluations, inspection team leader qualification appraisals, and quality assurance reviews. Bridge Field Services also develops inspection procedures, responds directly to the FHWA Michigan Division Bridge Engineer, and serves as the recognized resource for all inspection related inquiries.
- Load Rating The load rating program is administered by the Bridge Load Rating Unit. The program is responsible for ensuring that all bridges are load rated to verify the safe load capacity in accordance with the National Bridge Inspection Standards (NBIS). The Bridge Load Rating Unit performs capacity evaluations of complex bridges, truss bridges, movable bridges, and all other structures within the state-owned inventory. The area also serves as the technical consultant to FHWA, MDOT Divisions, regions, local agencies, and is responsible for assisting in FHWA NBIS Metric evaluations.
- Bridge Management and Scoping The bridge management and scoping program is operated by the Bridge Management Unit. The program is a balanced strategy made up of Replacement, Rehabilitation, Capital Preventive Maintenance (CPM) and Capital Scheduled Maintenance (CSM) that works to efficiently preserve bridges. The emphasis area of the scoping program is to address the needs of all structures of critical concern, and maintain the statewide inventory of bridges in good or fair condition.