Sarah Tracy, P.E., PTOE Assistant Traffic Engineer

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Presentation transcript:

Sarah Tracy, P.E., PTOE Assistant Traffic Engineer Dakota County, MN Comprehensive Approach to Safety Through the CIP Process Sarah Tracy, P.E., PTOE Assistant Traffic Engineer

Dakota County, MN

Dakota County, MN Minnesota’s 3rd-most Populous County Population 1990: 275,000 2000: 356,000 (+29%) 2010: 400,675 (+13%) 2030: 520,000 (+30%)

Dakota County, MN 424 centerline miles/1,080 lane miles Principal Arterial 18 miles (4%) Minor Arterial 212 miles (50%) Collector 180 miles (42%) Local 14 miles (4%) 250 traffic signals

Capital Improvement Program ?

Annual Process Listings: Intersection Crashes Intersection Traffic Control Assessment Aging Signal System Other: County Roadway Safety Plan (MnDOT) City & citizen concerns Studies Signal revisions Overlays

Intersection Crash Listing MnCMAT Program Criteria: 5 crashes current year 10 crashes in most recent 3 years

Intersection Crash Listing TIER 1 # of crashes 2013 to 2015 3-year total Crash rate & state average Severity Rate & state average Critical crash rate & crash rate index Rank by crash rate (may change)

Intersection Crash Listing

Intersection Crash Listing

Intersection Crash Listing TIER 2 Assess Top ~50 intersections Develop crash listings/diagrams as needed to ID trends ID Tier 3 locations

Intersection Crash Listing TIER 3 Detailed assessment ID CIP projects

Intersection Traffic Control Assessment Non-Signalized Intersections Signal Warrants Field and Safety Reviews

Intersection Traffic Control Assessment Warrants met Volume warrants points (ranking) Crash listing rank Traffic control comments Evaluate? CIP recommendation

Aging Signal System Listing Full reconstruction date 2017 age Crash ranking Maintenance Issues Recommended action

CIP Traffic Recommendations

CIP Meetings with Cities

CIP Meetings with Cities

Capital Improvement Program

Capital Improvement Program