DOT Practices on Road Safety Audits (2024) / Chapter Skim
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46 This chapter presents case examples for the use of RSAs by six DOTs (Figure 14) : Arizona, Idaho, Indiana, Massachusetts, South Carolina, and Virginia.
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Case Examples 47 Source: Map created with mapchart.net. Figure 14.
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48 DOT Practices on Road Safety Audits Arizona DOT's Practices for RSAs Arizona DOT closely follows the eight-step RSA process from FHWA. RSAs are initiated from various sources: network screening, requests from local jurisdictions through an online form, and requests from management.
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Case Examples 49 Source: Courtesy of Arizona DOT. Figure 16.
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50 DOT Practices on Road Safety Audits for RSAs with tribal governments. Transit RSAs are not commonly conducted in Arizona due to the lack of a heavy transit presence on the state highway system road network.
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Case Examples 51 During the field review, the RSA team noted several positive safety features along the corridor, including well-maintained signage and marking, wide shoulders, shoulder and centerline rumble strips, and safety edge (Arizona DOT 2014)
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Source: Map data © 2023 Google. Figure 20.
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Case Examples 53 of congestion during off-peak hours. Examples of safety concerns noted in the RSA report include aggressive driving and weaving movements at the SR 101 interchange, a missing second overhead guide sign at the Dobson Road interchange, consecutive lane drops at Rural Road and Mill Avenue (Figure 21)
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Source: Jacobs Engineering Group 2021. Figure 22.
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Case Examples 55 but ITD does not generally provide training for RSA team members, since most team members have experience with RSAs. ITD generally allocates 1.5–2 days for the RSA field review and debriefing meeting to develop recommendations for safety improvements.
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56 DOT Practices on Road Safety Audits of left turns for westbound traffic on Railroad Avenue (Idaho Transportation Department 2022)
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Case Examples 57 RSA Example: Gun Club Road Near Lewiston, Idaho In 2022, LHTAC conducted a consultant-led RSA on Gun Club Road from Stewart Avenue to Lapwai Road, near Lewiston, Idaho (Keller Associates 2022)
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58 DOT Practices on Road Safety Audits Source: Map data © 2023 Google. Figure 25.
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Case Examples 59 Source: Keller Associates 2022. Figure 26.
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60 DOT Practices on Road Safety Audits For the field review, Indiana DOT typically observes site conditions during one time period. For some projects with minor improvements, Indiana DOT does not conduct a field review.
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Case Examples 61 crashes. Operational analysis indicated that many segments were at LOS D and E
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62 DOT Practices on Road Safety Audits Massachusetts DOT Overview of RSAs in Massachusetts The Massachusetts Department of Transportation has been conducting RSAs since 2007. Massachusetts DOT initiated its RSA program because the agency wanted a more rigorous process for assessing safety improvements.
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Case Examples 63 The typical size of a Massachusetts DOT RSA team is more than 10 members. RSA team members usually include Massachusetts DOT personnel (e.g., Traffic and Safety Section, district traffic, design and maintenance)
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Source: Massachusetts DOT 2023c. Figure 31.
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Case Examples 65 of the development of required commitments) or incorporated into developer permits.
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66 DOT Practices on Road Safety Audits Source: Map data © 2023 Google. Figure 32.
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Case Examples 67 Source: Courtesy of Massachusetts DOT. Figure 33.
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68 DOT Practices on Road Safety Audits adding more catch basins, installing "No Parking" signs near the intersection, reconfiguring parking spaces located close to the intersection, installing new stop signs and street name signs, restriping pavement markings with high visibility materials, evaluating the feasibility of a bike lane or shared use path, restriping crosswalks, and installing curb ramps. The potential safety investments were presented in a table and categorized based on safety payoff, time frame (shortterm, medium-term, or long-term)
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Case Examples 69 Carolina DOT's RSA reports include access management, additional lighting, changes to traffic control, improvements to facilities for VRUs, and improvements to signage or pavement markings. For some of its more recent RSAs, South Carolina DOT has conducted a follow-up meeting with partner agencies after completion of the RSA report to help identify which agencies will be responsible for the implementation of various safety improvements.
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70 DOT Practices on Road Safety Audits Source: Map data © 2023 Google. Figure 36.
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Case Examples 71 the right-turn lane taper on Ladson Road, restriping the westbound US 78 approach to increase the left-turn storage lengths, and installing a concrete island, a crosswalk, and ADA ramps. Virginia DOT Overview of RSAs in Virginia The Virginia Department of Transportation has been conducting RSAs since 2007 when they were being promoted by FHWA.
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Source: Virginia DOT 2023e. [© 2023 Microsoft Corporation, © 2022 TomTom | Virginia Dept of Transportation, IT Department, Business Enablement Group Source boundary data for counties provided by the Virginia Information Technology Agency (VITA)
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Source: Virginia DOT 2019. Figure 39.
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74 DOT Practices on Road Safety Audits To screen locations for walkability RSAs, Virginia DOT uses the Virginia Health Opportunity index, which was developed by the Virginia Department of Health and incorporates factors such as walkability and access to health care (Virginia Department of Health n.d.)
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Case Examples 75 for Equity Analysis of Projects, one-third of households on the corridor do not have access to a vehicle, one-third of households have incomes less than $15,000, and approximately half of households have rents more than 30% of their household income. The RSA team included representation from the Petersburg Healthy Options Partnership, Tri Cities MPO, Virginia Tech, Petersburg Area Transit, Virginia Department of Health, Virginia State University, Petersburg Public Works, a local faith community, and a consultant on behalf of Virginia DOT.
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Source: Map data © 2023 Google. Figure 42.
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Case Examples 77 safety improvements. Long-term safety improvements suggested for the corridor include building additional sidewalks, increasing the separation from the travel lanes and sidewalk, moving or consolidating transit stops near signals or enhanced crossings, and an assessment of the conversion of Washington Street and Wythe Street to two-way roads.
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78 DOT Practices on Road Safety Audits • Many RSAs are initiated through some type of screening process, which may consider crash severity in addition to crash frequency and which may include VRU crashes in addition to vehicular crashes. DOTs also consider individual RSA requests from local agencies, developers, concerned citizens, law enforcement, and other stakeholders.
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Case Examples 79 Key Case Example Findings for DOT Partnerships for RSAs • Other agencies, such as MPOs and councils of governments, sometimes conduct their own RSAs using their own funding. • DOTs engage in partnerships with local agencies in various ways, such as funding RSAs for local agencies, including local agencies in DOT-led RSAs, participating in RSAs conducted by local agencies, and considering requests from local agencies for RSA locations.
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