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HomeMy WebLinkAboutHEARTHFIRE (HOFFMAN) - OVERALL DEVELOPMENT PLAN - 31-95 - CORRESPONDENCE - CITY STAFFJ The traffic study recommends, and the City agrees, that the Developer will be required to provide a northbound right turn deceleration lane and an acceleration lane on Highway 1 at the intersection with Douglas Road. At final P.U.D., the City will work with the State Department of Transportation to determine whether Highway 1 can,be restriped to utilize the existing shoulders for the deceleration and acceleration lanes or whether some additional paving is necessary. Douglas Road has been identified as a minor arterial (2 lane roadway) in the Northeast Area, Transportation Study and on the updated Master Street Plan. The Developer will be required to perform deflection testing on the existing pavement to identify areas of the existing roadway which need patching and/or reconstruction. Douglas Road may require an overlay from County Road 13 to Highway 1 to bring the pavement up to a 10 to 15 year design life. Further discussions about specific improvements will take place during review of the final P.U.D. when the deflection testing information is available. • With the street improvements described for the county roads, Highway 1, and Douglas Road, staff believes the vehicular traffic impacts directly related to this development have been addressed. However, staff suggests that the Developer address how this project meets the City's larger transportation network goals including alternative modes of transportation. For example, Douglas Road functions well for the existing and projected traffic volumes and meets the City's Code requirements for off -site street improvements at its present width (approximately 30 feet), but the shoulders are currently gravel. Although the gravel shoulders accommodate the equestrian use in the area, the Developer may want to consider paving the shoulders on Douglas Road to provide a bicycle connection to Highway 1. A n- HEARTHFIRE P.U.D. OVERALL DEVELOPMENT PLAN - REVISED 2/27/96 Engineering Department Comments - 2/29/96 • With the addition of the traffic calming measures and circuitous street connection through the southeastern part of the project to the Richard's Lake P.U.D. collector street, it is necessary to widen Hearthfire Drive to collector street width. Previous layouts included two equally direct routes from the Richard's Lake collector street northwest across the property to a common intersection with County Road 13. However, with the layout as proposed with the O.D.P. and revised preliminary plans, it is apparent that the majority of the traffic will use the most direct route across the property which is Hearthfire Drive. Since Hearthfire Drive will function as a collector street, especially when connected with the Richard's Lake P.U.D., it should be wide enough to accommodate two full travel lanes, bike lanes, and on -street parking. The City's 50' wide flowline to flowline standard collector street provides for two full travel lanes, bike lanes, and parking on both sides of the street. If sufficient off-street parking is provided on the large lots (lots 1 through 21) it may be adequate to provide parking on only one side of the street and therefore narrow the collector street width. A variance request prepared by a traffic engineer will be required for all proposed street design which does not meet current standards including street widths, roundabouts, curvature, etc. The Engineering and Transportation staff met with the County last fall to determine what off -site improvements are necessary on the County roads. The requirements are as follows: - County Road 13 must be paved adjacent to this development and up to the intersection with Douglas Road. Inverness Drive and Abbotsford Street must be paved to Gregory Road. A portion of Abbotsford is already paved, but it is likely that reconstruction or an overlay will be necessary to bring the pavement up to a 20 year design life. - County Road 13, Inverness Drive, and Abbotsford Street will all require a 20 year design life pavement, 24 feet in width with gravel shoulders and a borrow ditch on each side. - The Developer will be required to work with the County to improve the sight distance at the intersection of Gregory Road and Abbotsford Street.