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City of Orono Project No: 000139-10047-0 Old Crystal Bay Road Reconstruction Page 14 CITY OF ORONO – OLD CRYSTAL BAY ROAD RECONSTRUCTION 6.0 Street Improvements Old Crystal Bay Road was reconstructed in 1962 in conjunction with the utility installation. The current roadway consists of a rural section with two drive lanes and shoulders constructed of gravel or bituminous. Based on the record plans, the existing street section consists of approximately 4 inches of bituminous over a 4-inch gravel base and an 8-inch sand-gravel subbase. Since it was reconstructed, no major rehabilitation projects have been conducted on the road between Old Highway 12 and CSAH 6. Maintenance and rehabilitation has consisted of seal coating and spot repairs/patching. This has resulted in uneven wear and settling throughout the length of the road. In addition to the poor physical condition of the road, several other issues including traffic congestion and pedestrian safety were identified in a Traffic and Safety Study that was prepared in August, 2010 for the City of Orono. The Study identified several proposed roadway configurations that would eliminate or lessen the severity of these issues. Two of the configurations were chosen as the preferred options and have been analyzed as part of this report: Option 1 is the basic option consisting of adding turn lanes at several driveways and intersections, and Option 2 includes two roundabouts in addition to several turn lanes. See Figure 7 for the proposed typical street sections. Cost estimates for each of the options are presented in the Appendix. Under both of these options, it is likely that several utility poles will need to be relocated to accommodate the new roadway. We will work with the owners of these poles during the relocation process. We don’t anticipate any additional costs associated with relocating the poles. OPTION 1: TURN LANES Option 1 consists of constructing turn lanes at the critical intersections to provide additional vehicle storage for pick-up/drop-off, and to minimize back-ups behind left-turning vehicles. In addition, three driveway entrances would either be closed or restricted to right-out to limit right-angle conflicts. There are no medians in this option. See Figure 5 for the proposed layout of Option 1. OPTION 2: ROUNDABOUTS Option 2 consists of constructing two roundabouts: one just north of Kelley Parkway at the City Hall/Elementary School driveway, and the other at the south driveway to the Middle and High School parking lots. The proposed roundabouts have a smaller diameter radius than a standard roundabout in order to limit the right-of-way acquisition that will be necessary for construction. In addition to the roundabouts, several turn lanes will be provided. There are also proposed 4-foot wide raised concrete medians along the section of the road between the two roundabouts (approximately 1200 feet). The median would function as a barrier to unwanted pedestrian roadway crossings, and potentially reduce vehicle speeds. It is anticipated that approximately 17,200 square feet of right-of-way would need to be acquired from the City and the School District for the construction of the roundabouts. See Figure 6 for the proposed layout of Option 2, as well as the approximate location of the additional right-of-way. For additional traffic information and strategies, see the August, 2010 Traffic and Safety Study. Item #10 - CC Agenda - 10/25/2010 Old Crystal Bay Road Reconstruction Feasability Study [Page 17 of 42]