Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges (2023) / Chapter Skim
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21 Case Examples This chapter contains a summary of three case examples. Each state DOT case example interview was focused on the following topics: • Project details or general information about practices.
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22 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges used for the bridge plan and design vary based on the facility type and areas. MassDOT adopts several design guides to ensure that bicycle and pedestrian accommodations are made within the range of standards (Figure 10)
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Case Examples 23 Plans developed by MassDOT in 2019 also plays an important role in influencing its practices for providing or improving access for active transportation users in the bridge retrofit project. These plans help identify whether the bridge is a critical gap in the bicycle and pedestrian network.
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24 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges In terms of conceptual designs, the designer/consultant often holds public outreach meetings with local officials, the general public, and property owners and businesses abutting the project. Then, with the base plan and design, the project manager hosts bridge-scoping meetings again to confirm the scope.
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Case Examples 25 changes in active transportation trips and crashes at the state, county, or city level instead of those before and after a specific project. MassDOT staff recognized the importance of adding bicycle and pedestrian access to existing bridges for the entire bike and pedestrian network system.
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26 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges Michigan Department of Transportation The interview with MDOT staff was less about one specific project and more about overall practices concerning access for pedestrians and bicyclists on vehicle bridge retrofit projects. The staff referred to many bridges as examples when discussing various aspects, from planning and design to funding and stakeholder input -- some of which are mentioned in this summary.
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Case Examples 27 The second driver is the MDOT bridge replacement strategy in the region. Is funding available to replace a bridge or significantly alter bridge decking?
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28 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges Depending on the type of development, turning movement volume estimates may mean that the removal of travel lanes or the center turn lane is not practical. Furthermore, the operation of the bridge as it is today or in the near future may warrant additional car lanes.
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Case Examples 29 lane. This type of lane separator would not be appropriate for a sidewalk already elevated.
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30 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges to guide designers on railing decisions. Posted speed and sidewalk/brush block width are factors to consider, among others.
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Case Examples 31 Source: MDOT (2019a)
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32 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges Source: Google Maps. Figure 17.
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Case Examples 33 Having a funding partner is the goal of bridge retrofit projects that go beyond the basic design of what MDOT can fund. Interviewees pointed to the Ypsilanti Huron Street Bridge Project as an example in which many partners helped fund the project.
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34 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges Political changes were mentioned as an issue that MDOT must contend with. Sometimes elected officials or staff want facilities for pedestrians and bicyclists.
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Case Examples 35 Interviewees reiterated the challenges of funding bridge retrofit projects. Local agencies tend to seek all of the access and protections for active transportation users in addition to driving, but they want MDOT to pay for it, which is problematic; consequently, they welcome cost sharing.
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36 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges Planning and Design The Fuller Warren Bridge improvement is part of a larger rehabilitation project, the I-10/I-95 Interchange Improvement Project. Interviewees identified many factors used to determine if and how this bridge would be retrofitted to improve access for active transportation users.
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Case Examples 37 traffic. They stated: "In particular on bridges, unless it is a low-speed condition our typical bridge sections do have positive protection." When adding sidewalks or repurposing bridge space to add bicycle and pedestrian facilities, FDOT is including positive protection, which would typically be a concrete barrier.
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38 Practices for Adding Bicycle and Pedestrian Access on Existing Vehicle Bridges Implementation and Performance Monitoring While public health was not a key component of performance monitoring measures, it ties into addressing safety performance and accommodating pedestrian and bicycle demand. Interviewees discussed the Highway Safety Manual process for calculating benefits and costs by comparing crashes before and after the project.
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