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Mr. Norm Hanson • • . August 29, 1996 Page 2 CTH BB is a 26-foot wide rural asphalt roadway with 3-foot gravel shoulders. Kennedy Road is a 22-foot wide asphalt roadway with 2-foot gravel shoulders that intersects with CTH BB at a "T" intersection from the north. The speed limit on CTH BB is 55 mph and 45 mph on Kennedy Road. Traffic at this intersection is controlled by a stop sign on Kennedy Road. The sight distance is sufficient in all directions except for the east leg of CTH BB. The sight distance on this leg is 780 feet, which is sufficient for a stopping sight distance, but is not adequate for vehicles turning right onto the CTH BB westbound and reaching the 55 mph design speed not without requiring an approaching vehicle to slow down. The recommended acceleration sight distance based on the American Association of Highway and Transportation Officials (AASHTO) Green Book is 1,200 at a minimum. Future Conditions Kennedy Road currently has 33 vehicles turning from the north leg onto BB and 7 turning onto Kennedy from CTH BB for a total peak hour volume of 40 vehicles. The proposed residential development on the north end of Kennedy Road will ultimately add 75 single family homes. Based on the Institute of Transportation Engineers (ITE)Trip Generation Manual, this will add .76 trips per unit, or 57 trips in total. Of these 57 trips, 42 will be exiting onto CTH BB, and 15 will be entering onto Kennedy from CTH BB. Full build out of the development is assumed to occur over 5 years (year 2001)with an assumed increase in the background traffic of 1 percent per year(5 percent). There will be additional development on platted lands along Kennedy Road and north of this development in the future. However, American Way, a roadway that ties into CTH BB east of Kennedy Road, should carry much of this traffic. Based on the projected traffic volumes, a level of service analysis was again performed for the intersection assuming the 5 year build out. The results of this analysis are shown in Table 1: Table 1 IPresent Conditions I Future Conditions Kennedy Road left LOS A LOS A - ' right LOS A LOS A CTH BB right LOS A LOS A Recommendations The existing and future intersection function at an adequate level of service as currently constructed. The analysis shows there is no reduction in the current level of service based on the proposed development. The intersection will continue to operate at a high level of service. The major concern for the future is the lack of turning movement storage eastbound and W128A0031W128-96B