8.1. SR 05-04-2020 - Laserfiche WebLink

Home Browse Search

MnDOT Contract No. 1028386 Work Order No. 1 Exhibit B Detailed Scope of Work and Deliverables 10 For future condition considerations the consultant team will apply their experience with the Interactive Highway Safety Design Manual suite of tools. Using the Federal Highway Administration’s (FHWA) Crash Prediction Model of the Interactive Highway Safety Design Model (IHSDM), the consultant team will develop a predictive safety model for TH 10 within the study area. If the roadway geometric data needed for this analysis is not readily available from State or past studies, the consultant team will collect the data using Google Earth and verify with Local Government/Agency and State staff. The focus of the future safety evaluation will be to identify locations of potential safety concern and understand how the existing roadway geometrics impact safety performance. The consultant team will use information from the base year and 2045 conditions with forecasts as inputs into the IHSDM safety model. Quantitative results of the crash prediction will help identify safety needs along the corridor and incorporate safety into the evaluation. Access Plan Given State’s access classification (1AF – transition to a freeway), along with operational and safety concerns, it is anticipated that one of the key focuses will be transitioning TH 10 to a full freeway facility. Planning for access is one of the most critical aspects of this study. The businesses along the corridor have a heavy stake in access to TH 10. As such, it will be paramount to understand how their business needs to be supported as well as issues that these accesses cause. Under future conditions, these access and safety challenges are likely to increase. The consultant team will put a significant effort into understanding access needs currently and into the future and develop concepts that provide consistent, safe access as well as good circulation patterns to land use. The consultant team has developed an access evaluation process that provides a framework for developing a consistent access strategy along a corridor and for a way to implement access strategies over time as development occurs – this process has proven tremendously effective in a number of other corridor studies we have worked on. A comprehensive access inventory will be developed as part of the evaluation and summarized in tabular and graphical form. This includes identifying access location, access configuration (i.e., full, tee, right-in/right-out), type of access (public or private), access control measures, type of usage (truck or auto), cross-street function, and presence of turn lanes. The consultant team will then define the desirable access spacing based upon State’s access management guidelines, corridor vision and goals, safety implications, current roadway network and context with other major facilities (i.e., ability to connect and facilitate movements regionally and/ or inter-city). The consultant team will also look at past access decisions including current access agreements that may be in place with area businesses or property owners. The consultant team will identify this as the preferred “access template” or access goal. The preferred access template will then be overlaid onto the current accesses (i.e., base conditions) to identify inconsistencies with the access spacing objectives. Each inconsistency will be enumerated by type (i.e., public, private commercial, private residential, or private agriculture) and classified by replacement difficulty levels. Access consolidation and/ or removal levels range from 1 (easiest to accomplish – has alternative access to public street) to 3 (most difficult – generally requires purchase of access rights and/or redevelopment). These inconsistencies will then be evaluated in detail to determine the alternative design solutions, potential impacts, and their costs to achieve the desired spacing. The final deliverable from this activity will be a set of access modification recommendations that will be incorporated in to the concept alternatives in short-, mid-, and long-term timeframes.