Oakleigh Lane, which is not identified on the adopted Street Classification Map or the adopted <br />Right-of-Way Map (Fig. 60-61 of the Arterial and Collector Street Plan (ACSP)), is a local street. <br />Staff concurs with the applicant's assessment on page 43 of the written statement that <br />Oakleigh Lane is a low-volume local street. There are currently 25 residential tax lots along <br />Oakleigh Lane and with the addition of 28 units as a result of the proposed development, the <br />ADT would be greater than 500 trips per day, which is within the expected 250-750 ADT range <br />for low-volume streets. The low-volume classification is consistent with the determination for <br />other similar dead end. streets located east of River Road and north or south of Oakleigh, that <br />were also identified as low-volume streets in recent land use decisions. Staff acknowledges that <br />the existing pattern of development on Oakleigh Lane, which is described by the applicant on <br />page 30 & 40 as "having a country lane feeling" includes a number of structures that were <br />constructed close to the existing pavement and right-of-way, may result in the need f or creative <br />street design when the street is improved through a future LID process. <br />Per Table 9.6870 the minimum right-of-way width for low-volume streets is 45'. The existing <br />right-of-way in Oakleigh Lane is 20', which was dedicated by the properties to the north per the <br />Plat of Oakleigh in 1927. Staff notes that the southerly margin of this 1927 dedication forms the <br />centerline of Oakleigh Lane and that any additional dedications would necessarily be based on <br />this centerline. <br />Based on the right right-of-way requirement of 45' and the existing right-of-way width (which <br />as noted, is located entirely north of centerline), an additional 22.5' south of the centerline is <br />required. This dedication would satisfy the right-of=way requirement for the properties south of <br />centerline, with the remainder of the 45' right-of-way being required from the properties on <br />the north side of the centerline. <br />However, per the findings at EC 9.6815, the applicant qualified for an exception to the street <br />connectivity requirements. The alternate street study identified the amount of right-of-way <br />necessary to construct an emergency vehicle turnaround beyond the end of the existing <br />Oakleigh Lane, which would also provide the necessary frontage for flag lot development of TL <br />200. The proposed turnaround would straddle the common property line*hetween the <br />proposed development and TL 200. The portion of the right-of-way that is located within the <br />proposed development is identified on Fig. 1 of the `alternative street study as being a strip that <br />is 9' wide x 116:5' long. (Staff notes that the length should be 117' to allow an extra 6" for <br />constructability issues). <br />Staff notes that while the applicant's proposal is sufficient to accommodate the turnaround, the <br />proposal does,not include a sidewalk'along the south side of the turnaround which would be <br />necessary to separate pedestrians from vehicles and provide a safe,public walking surface for <br />the residents of the proposed development. The amount of right-of-way necessary to allow for <br />the construction of the proposed turnaround and adjacent sidewalk would be 33' or 13' on the <br />south side of the existing centerline,. which as previously noted is co-incident with the property <br />line. These dimensions assume a 21' wide paved surface that is shown on the tentative plan as <br />PDT13-01 Oakleigh Cohousing Page 10 of 22 <br />1264 <br />