Transportation System Plan 2018-2038

Table 3-3 Continued Status of Existing Bridges in Medford UGB Bridge ID Highw ay Mile Point Crosses Juris- diction Sufficien cy Rating Status 6644B OR 99 5.57 Creek ODOT 85.0 N/A, culvert 03660 OR 99 8.03 Crooked Creek ODOT 43.0 Structurally Deficien t 0M273 OR 99 8.09 Creek ODOT 82.0 N/A, culvert 03661 OR 99 8.17 Irrigation Canal ODOT 85.0 Not deficient or obsolete ? OR 238 ? COP RR ODOT ? Not deficient or obsolete Source: ODOT , 2003 Existing Traffic Volumes Figure 3-3 shows existing 2000 daily traffic volum es on selected roadway sections throughout the City , as shown on the City Traffic Engineering Division traffic volum e map. Also shown are volum es on state facilities including I-5, Highway 99, Highway 238 and Highway 62. As indicated in this figure, significant volum es of tr affic are carried through and within the Medford UGB by Interstate 5. Interestingly enough, Highway 62 from near I-5 to the northeastern corner of the UGB carries sim ilar volum es although not on a grade-separated, fully access-controlled facility . Other key traffic-carry ing streets in the Medford UGB include : McAndrews Road, Barnett Road, Crater Lake Avenue, and Highway 99. Because the new alignm ent for Highway 238 from the Highway 99/Highway 62 intersection opened so recently , the traffic counts in Figure 3-3 do not reflect the growth in traffic that has occurred through the “Big X” and westerly on Ro ssanley since the new roads opened. Additionally , the volum es shown in Figure 3-3 also understate m ore recent traffic growth on Ross Lane between Rossanley and Main Street that is re lated to the opening of the “Big X”. Existing Traffic Operations This section addresses existing transportation sy stem operations on City streets within the UGB, and on state highway s within the City , which are evalua ted using different m easures of effectiveness. Intersection Levels of Service (LOS) and Existing City of Medford LOS Standard Intersection levels of service (LOS) for signalized inte rsections are grades of A through F that are used to rate the intersection perform ance within a specified time period, ty pically the AM or PM peak hour. Assignm ent of a specific LOS is based on average control delay per vehicle, which is calculated using equations that take into account turning m ovem ent vol umes, intersection lane geom etry and traffic signal features, as well as characteristics of the traffic st ream passing through the intersection, including time required to slow, stop, wait, and accelerate to m ove th rough the intersection. Progressively higher LOS reflect increasingly worse intersection perform ance, with higher levels of control delay and increased congestion and queues. Characteristics of each LO S are briefly described below in Table 3-4. The City of Medford’s Comprehensive Plan has established LOS standards that are intended to guide roadway design and im provem ent priorities by establishi ng a threshold for determ ining the level of delay that is unacceptable to the com munity , thus triggeri ng a roadway or intersection im provem ent. Currently the acceptable LOS threshold is LOS D or better. Under its current application, this standard requires that zone change decisions not allow increases in tr affic that would exceed Level of Service D. Medford Transportatio n System Plan 3-10 Existing Conditions