GIOELLO Nick R <br />From: <br />GIOELLO Nick R <br />Sent: <br />Monday, September 25, 2017 11:45 AM <br />To: <br />'Brent Lorscheider' <br />Subject: <br />FW:_ Road Load on Capital and-Spring <br />Brent, <br />See below from Scott Gillespie. <br />Thanks, <br />Nick <br />Nicholas R. Gioello, M. Adm. <br />Associate Planner j Manning Division <br />City of Euc!ene <br />i u' <br />P7.ann -ng & Development <br />99 Vies1 I0"' Avenu. <br />uoe0 recmn 9'401 <br />P 54 i 682.S4I _ <br />nick,r._icial cr.us <br />From: GILLESPIE Scott N <br />Sent: Monday, September 25, 2017 11:35 AM <br />To: GIOELLO Nick R <Nick.R.Gioello@ci.eugene.or.us> <br />Cc: FAVREAU Eric J <Eric.J.Favreau@ci.eugene.or.us> <br />Subject: FW: Road Load on Capital and Spring <br />Hi Nick, <br />1) Pavement design for public streets is addressed in the most current City of Eugene 2016 Public <br />Improvement Design Standards Manual. Here is a link to the 2016 Public Improvement Design <br />Standards Manual. The City utilizes the 1993 AASHTO Guide for Design of Pavement Structures <br />including the 1998 supplement, as amended by the 2016 City of Eugene PIDS. The current AO 58-16- <br />01 adopts the PI DS Manual and repealed AO 58-11-11. <br />2) Class counts are typically an average 24 volume. 5.6 Class 5 vehicles would not be unexpected for a <br />residential area like Capital Drive. <br />3) Pavement design does not directly factor in construction traffic from surrounding areas as a design <br />input. It's factored indirectly through empirical data. Construction traffic is temporary and nearly <br />impossible to directly predict. ESAL growth factors are empirical and anticipate construction activity, <br />seasonal fluctuations and anticipated heavy vehicles. The growth factors include averages of all <br />activity that can be expected on Oregon's roadways. This includes construction traffic. Practically <br />speaking, the 5.6 heavy vehicles on daily basis over 30 years has a larger impact on ESAL's than <br />construction traffic from a specific project. The existing pavement section far exceeds the require <br />design based upon the calculated Structural Number (SN) and can accommodate more vehicles <br />(including heavy vehicles) than what is minimally required for the existing neighborhood and proposed <br />development. <br />