Ada County, Idaho, is working to implement an access management policy for a developing north-south regional roadway. The existing roadway was a rural, two-lane arterial facility with 15,000-28,000 vehicles per day. The roadway was recently reconstructed and expanded to a four/five lane facility. The new design provides a rural roadway cross section without curbs, gutters, or sidewalks. The signed speed limit is 55 mph (88 kph) with fully actuated traffic signals at the mile intersections. The south end of the corridor provides an interchange with Interstate 84. Two transportation agencies are involved in planning the access management system: the Idaho Transportation Department and the Ada County Highway District. Access management is viewed as a method of maintaining the speed and capacity of the roadway without additional roadway widening in the long term. This paper reports on the project's background, the issues involved with plan implementation, the multijurisdictional coordination needed to approve and implement the plan, and the cost and time involved with project implementation. The recommended access management plan was developed to progress from the existing access conditions to a future access restricted expressway. Five levels of access management were proposed. The recommended progression of access management was developed to minimize the impact on adjacent developments, to allow for the development of a future parallel and connecting collector street network, and to minimize the expenditure of public funds through the acquisition of right-of-way improvements.


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Media Info

  • Pagination: 4p

Subject/Index Terms

Filing Info

  • Accession Number: 00770331
  • Record Type: Publication
  • Report/Paper Numbers: Publication No. CD-006
  • Files: TRIS
  • Created Date: Oct 25 1999 12:00AM