3-lane section. Levels of service are considered to be within an acceptable range for values of LOS D or better.
| Existing Condition (4 lane section) | Proposed Condition (3-lane section) | |||
|---|---|---|---|---|
| CROSS STREET | DELAY (SEC) | LOS | DELAY (SEC) | LOS |
| Claranna Avenue | 19.3 | C | 30.5 | D |
| Wiltshire Boulevard | 23.6 | C | 32.8 | D |
| Greenmount Blvd | 14.1 | B | 21.0 | C |
Capacity analyses are summarized in Appendix E.
The construction costs for sawcut of pavement, excavation, raised medians, and signs is estimated to be $480,000. The construction costs do not include aesthetic enhancements such as landscaping of the grass medians. Landscape design of the medians should take into account intersection sight distance during the preliminary design.
See Appendix F for construction cost estimate.
There were a total of 14 crashes involving vehicles from the Speedway site in the northeast quadrant of the Dorothy Lane and Shroyer Road intersection. None of the crashes occurred within the AM (7:15 to 8:15) and PM (4:45 to 5:45) peak hours.
- Seven (7) angle crashes occurred at the Speedway access on Shroyer Road. All but one of the angle crashes involved through traffic on the southbound approach to Dorothy Lane. One crash involved a southbound left turning vehicle entering the site. One crash involved an emergency vehicle traveling left of center to avoid queues on the southbound approach.
- Six (6) angle crashes occurred at the Speedway access on Dorothy Lane. All crashes involved vehicles exiting the Speedway site with the majority turning left.
The Shroyer Road access is located 100 feet from the Dorothy Lane intersection whereas the Dorothy Lane access to the Speedway site is located 80 feet from Shroyer Road.
Restricting the left turn movement from the Shroyer Road access is proposed as the most feasible countermeasure to mitigate crashes. Motorists leaving the site can reach all destinations by using the Dorothy Lane access. The implementation of such a change of access can be accomplished by narrowing the median opening on Shroyer Road by 20 feet to allow southbound left turn, northbound right turn, and westbound right turn movements to/from the site.
Implementation costs if incorporated as part of the resurfacing project is estimated at $5,000 for sawcut of pavement, excavation, signs, and concrete median costs. Maintenance of traffic is included as part of the separate resurfacing project. See Appendix F for a detailed breakdown of the cost estimate.