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CCRPC demonstrates Transportation Resilience Planning Tool aimed at statewide risk mapping

Chittenden County Regional Planning Commission Transportation Advisory Committee · April 1, 2026
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Summary

CCRPC staff demonstrated the TRPT web tool that maps vulnerability and criticality for road segments and structures to prioritize flood-mitigation strategies; phase 3 will expand the pilot to statewide coverage.

Pam Brangan, CCRPC GIS data and IT manager, demonstrated the Transportation Resilience Planning Tool (TRPT) to the TAC on March 2 and described how it assesses vulnerability and criticality of bridges, culverts and embankments to produce a combined risk score.

Brangan explained that the TRPT calculates risk as the average of vulnerability and criticality and categorizes mitigation strategies into four groups tied to the drivers of vulnerability. She reviewed definitions, examples and a live demonstration of the online map tool; staff noted the road network modeled includes all public roads except private roads. Earlier phases piloted the tool in 2018 and 2020, covering about 20% of Vermont watersheds; phase 3 will complete statewide coverage.

Members asked whether road managers would be convened to review and use the tool; Brangan said such meetings will be scheduled and that the TRPT should be mentioned in All Hazard Mitigation Plans. One participant expressed concern that TRPT data might supplant locally used data in emergency management plans; staff said the tool is intended to be an input to AHMPs and that an outside consultant previously developing AHMPs had missed some local data and input.

The TRPT website and the presentation slides are posted on the TAC webpage; staff will begin outreach to road managers and seek integration with local planning.