The South Dakota Department of Transportation’s (SDDOT) pavement management system has identified the portion of SD42 from the McCook/Minnehaha County Line to SD17 for either a major rehabilitation or reconstruction project within the next eight years.

While most of the 15 miles in the corridor exceeds the desired conditions threshold, it is uncertain how long the condition will last. From SD 17 through the McCook County line the observed 2014 Surface Condition Index of is above the above the desired statewide target, but not by a substantial margin. Even with routine annual maintenance, the condition will likely continue to decline, which supports the statement that within the next eight years a substantial rehabilitation project is likely needed.

As important to doing the study as road condition are addressing traffic operations and safety in the corridor. SD 42 serves as a connector from the rural areas west of Sioux Falls to 12th Street – the primary east-west route into and through town. Thus, as development in many parts of the city continues to grow, it is likely that volume in the SD 42 corridor will grow as Sioux Falls becomes an even greater travel attractor. Figure 1 displays the increment and location of household and employment development anticipated in the corridor between 2015 and 2040, which was prepared as part of the Long Range Transportation Plan Update. Minnehaha County has also identified in the Comprehensive Plan future commercial and residential development nodes at SD 17 and adjacent to Wall Lake, respectively. Anticipated future development along the corridor influences the need to address the study area of the corridor.

Population Change MapGiven the corridor’s proximity to the Sioux Falls metropolitan area, it is prudent to:

  • Ensure that the correct typical section is provided to accommodate the anticipated traffic volume for the duration of the service life of the rehabilitated or reconstructed pavement. Included in evaluating the desirable section are intersections and segments between intersections.
  • Develop a plan of the appropriate intersection control based on peak period approach volume, turning movements, and mix of vehicles from autos to heavy commercial vehicles.
  • Identify a plan to address bicycle and pedestrian needs in the corridor.
  • Identify appropriate locations for public and private access points.

Employment Change Map