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L Chris Seigle November 30, 1988 Page 5 These two intersections current'iy have adequate traffic capacity and the pro- ject's impact on each will be minimal. The unsignalized intersection of Lexington Avenue and the project access drive- way was analyzed under the assumption that traffic signals would be undesirable at this intersection. This intersection is too close to the existing adjacent signal at Lexington Avenue and TH 36 to operate effectively if signals were installed. Therefore, the analysis of traffic operations was concentrated on the maximum allowable traffic that would be desirable under an unsignalized con- dition. In such cases, the left turn onto the major street is the critical movement at an unsignalized intersection. Based on standard warrants for traf- fic signals from the Manu"l on Uniform Traffic Control Devices, it is considered desirable to have less than 150 peak hour left turns per hour onto a major through sti-eet such as Lexington Avenue. The following table summarizes the project's traffic impact in consideration of this analysis: Number of Side Street Left Turns (veh/hour) Existing Plus Maximum Intersection Existing Project Desired Lexington/Project Access 45 76 150 Given the analysis presented above, no major improvements are needed at these two intersections. However, it is recommended that two full lanes (i.e., a right turn lane and a left turn lane). be provided at the project's exit to Lexington Avenue. This would require some additional roadway width beyond that shown on the project site plan. It should be noted that existing traffic which uses the roadway which will become the project driveway to Lexington Avenue con- sists mainly of traffic to and from an existing day care center. In addition to the 4:30 PM to 5:30 PM peak hour traffic conditions described above, the project traffic impacts were considered in the 7:30 AM to 8:00 AM and 2:00 PM to 2:30 PM periods. Existing and existing plus project traffic con- ditions for all three traffic periods are shown in Exhibits 6, 7, and 8. During the 7:30 AM to 8:00 AM the major movement into the site will be a northbound right turn from Lexington Avenue. This movement is not critical to traffic operations at the intersection. During the 2:00 PM to 2:30 PM period, there will be a heavy outbound left turn movement to Lexington Avenue. Although this movement will involve some delay to vehicles exiting the project site, it will not cause delay to vehicles along Lexington Avenue. i 1