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Memorandum <br />h-' <br />B R W INC <br />IManning <br />Transportation <br />Engin«^nng <br />Urban Desnm <br />Thrtrsh^r Square <br />700 Third Street So. <br />Minneapi>lis, <br />MN‘^5415 <br />»>12 370-07(X) <br />Faxfel2/370-l37S <br />Denver <br />Milwaukee? <br />\linneapi>iis <br />Orlando <br />Phoerix <br />Portland <br />San Diego <br />Seattle <br />DATE: <br />TO: <br />FROM: <br />RE: <br />(ktober 11. 1995 <br />Keith Dahl <br />Howard Preston, PE, Vice President of Traffic Engineering <br />Jeff Holstein. PE, Senior Traffic Engineer <br />SCOTCH PINE ADDITION; Scotch Pine Lane Vacation <br />We have investigated the traffic-related issues associated with the vacation of <br />Scotch Pine Lane as proposed on the SCOTCH PINE ADDITION Preliminary <br />Plat. It is our understanding that the proposed action would result in an additional <br />residential access drive to Hennepin County Slate Aid Highway 51 (CSAH 51) <br />approximately 250 feet east of exi.sting Scotch Pine Lane and that existing Scotch <br />Pine Lane would be vacated as a public street and maintained in it’s current <br />location as a common residential driveway. The proposed new access drive would <br />serve one home and the common access drive would .serve two houses, '^’he <br />following paragraphs describe the traffic-related i.ssues that were investigated and <br />the conclusions of our analysis. <br />Appropriate Access Spacing Alone CSAH 51 <br />The appropriate access spacing along CSAH 51 is dependent upon the design <br />function or functional classification of CSAH 51. Roadways are typically divided <br />into functional classes for purposes of applying design criteria, establishing <br />jurisdicticpal authority and determining available sources of funding. Tne two <br />characteiistics that determine a roadway ’s functional classification are access and <br />mobility. These two functions confiict with each other as the roadway network <br />attempts to serve its two basic purposes. Typically, the greater the access, the less <br />the mobility that is possible and as the degree of access is limited, the mobility <br />of the highway .segment is increased.