Capital Hill PUD Traffic Safety Analysis <br />(Revised) August 8, 2017 <br />3.0 DEVELOPMENT AND TRAFFIC CONDITIONS <br />3.1 Land Use <br />The result of the land use applications will allow five existing tax lots on the site to be divided <br />into 33 separate tax lots. The post developed conditions may include up to 31 new residences <br />bringing the unit total to 37, including three existing single family dwelling units and three <br />existing attached multi-family dwelling units. A likely development scenario could include up to <br />28 new single family detached housing units (dwellings) and three (3) new multi-family attached <br />housing units. Two existing driveways on Capital Drive are proposed to remain to continue to <br />serve existing residences at 2875 and 2955 Capital Drive, while the other two driveways (as <br />described previously) will be improved to create a private loop through the site to access newly <br />constructed residences and existing residences at 2855 and 2995 Capital Drive. The two accesses <br />proposed to be utilized as a loop through the site will not provide connectivity to other existing <br />driveways. One additional driveway is proposed on Capital Drive between Cresta De Ruta Street <br />and Alta Vista Court that will provide access for two new parcels created with the proposal (lots <br />18 and 19). A site plan is provided as Appendix E. <br />3.2 Development Traffic <br />Based on available national average trip generation rates published by the Institute of <br />Transportation Engineers (ITE) in the Trip Generation Manual, 91 Edition, peak hour trip <br />generation of the entire development site (existing + proposed), with a total of 31 single family <br />detached dwelling units and 6 multi-family apartment units, would create a total demand for up <br />to 27 AM peak hour trips and up to 35 PM peak hour trips, which would equate to about one new <br />car every two minutes during peak hour traffic conditions. Since the development does not <br />result in greater than 100 peak hour trips during any one peak hour period, the proposal does <br />not require a traffic impact analysis based on the TIA applicability of City of Eugene <br />Development Code (EC) 9.8670 which looks at the entire site's highest peak hour trip generation <br />potential. <br />To approximate new daily traffic resulting from proposed development, a reference was made to <br />tube count data collected near Cresta De Ruta Street that indicates the average daily trip <br />generation per occupied dwelling unit is approximately 4.53 trips/unit/day, calculated from an <br />average of 59 daily trips counted and 13 existing dwelling units occupied from Cresta De Ruta <br />Street to the end of Capital Drive (including multi-family and single-family residences). The <br />calculated trip generation rate is lower than the daily rate provided by the Institute of <br />Transportation Engineers' (ITE's) trip generation rate derived from surveyed sites. The difference <br />in rates is likely due to the study area's geographic location and the separation distance between <br />the site and retail and other urban development attractors that would increase the average daily <br />trip generation potential. There is no reason why the post development traffic conditions would <br />be expected to generate any levels of traffic at a rate greater than the count data indicates on a <br />per unit basis. The increase in traffic and the types and levels of traffic generated maintains <br />consistency with the residential use designation of the site, surrounding development and the <br />intended use of the existing street. The intensity of the proposed development is consistent with <br />the density and objectives of the South Hills Study. The addition of the new trips will not change <br />the functional classification or traffic character of Capital Drive. <br />© Branch Engineering, Inc. <br />Page 1 9 <br />