NH Route 28 Corridor Safety Audit Preliminary Analysis of
Historic and Existing Conditions
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Road Safety Audits ( 23 CFR Part 924) Road Safety Audits means
a formal safety performance examination of an existing or future
road or intersection by an independent multidisciplinary audit
team. Road Safety Audits are identified as a process for conducting
engineering studies of hazardous locations, sections, and elements
to develop highway safety improvement projects.
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Background Information Crash Analysis Vehicle Counts: Volume,
Speed, Classification Zoning and Land Use Sign Inventory Pavement
Evaluation LOS Vehicles, Bicycles, and Pedestrians
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SR28 Preliminary Crash Analysis Segments Rate Quality Control
Segments with higher than average crash rates Intersections
Equivalent Property Damage Only EPDO Greater than 25 Behavioral
Aggregate summary of crash records
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Segments
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Intersections
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Background Information Crash Analysis Vehicle Counts: Volume,
Speed, Classification Zoning and Land Use Sign Inventory Pavement
Evaluation LOS Vehicles, Bicycles, and Pedestrians
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1 ALTON (South of Prospect Mountain High School) 2 ALTON (South
of Stockbridge Road) 3 ALTON/BARNSTEAD town line 4 BARNSTEAD (South
of Peacham Road) 5 BARNSTEAD (North of NH Route 126) 6 BARNSTEAD
(South of NH Route 126) 7 PITTSFIELD (North of Leavitt Road) 8
CHICHESTER (South of Webster Mills Road) 9 CHICHESTER (South of
Bear Hill Road) 10 CHICHESTER (Main Street West of NH Route 28) 11
EPSOM (North of Epsom Traffic Circle) 12 EPSOM (South of Short
Falls Road) Location Order
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Sample of data collected for each location.
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Corridor 85 th Percentile Speed vs. Posted Speed Limits
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Background Information Crash Analysis Vehicle Counts: Volume,
Speed, Classification Zoning and Land Use Sign Inventory Pavement
Evaluation LOS Vehicles, Bicycles, and Pedestrians
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Background Information Crash Analysis Vehicle Counts: Volume,
Speed, Classification Zoning and Land Use Sign Inventory Pavement
Evaluation LOS Vehicles, Bicycles, and Pedestrians
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Background Information Crash Analysis Vehicle Counts: Volume,
Speed, Classification Zoning and Land Use Sign Inventory Pavement
Evaluation LOS Vehicles, Bicycles, and Pedestrians
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Background Information Crash Analysis Traffic Volume Speed
Study Vehicle Classification Counts Zoning and Land Use Sign
Inventory Pavement Evaluation LOS Vehicles, Bicycles, and
Pedestrians
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Next Steps Obtain Crash Records for Identified Intersections
Behavioral Analysis Crash Summary Additional data collection may be
required Sign Retro-reflectivity Turning Movement Counts at
specific locations Additional Speed Counts to fill in data
gaps
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Next Steps - continued Road Safety Audit & Crash Reduction
Factor Training Manchester Community College March 3 rd and 4 th
2009 Conduct Road Safety Audit Recommend Cost Effective
Improvements
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Project Timeline 20082009 Tasks /
MonthSepOctNovDecJanFebMarAprMayJunJulAug 1. Data Collection 2. PAC
Development 3. Committee Meeting I 4. Training 5. Safety Audits 6.
Committee Meeting II 7. QBS Consultant 8. Conceptual Improvements
9. Committee Meeting III 10. Final Report 11. Community
Presentations