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o Westbound Weber Avenue to Site o Site to Eastbound Weber Avenue Based on the ability of trucks to complete turns at the intersections, this assessment identifies whether project-related trucks can make turns without leaving the paved surface or encroaching into the opposing travel lane. The spatial database used in the analysis of truck turning movements includes aerial photography acquired from Google Earth aerial photographs. These aerial photographs have relatively good resolution. No new aerial photography was developed for this analysis. The aerial photographs show the latest geometry at the intersection. This geometry was considered under existing roadway conditions. The assessment of truck turning movements was conducted using the AutoTURN software prepared by Transoft. This software implements procedures described in the American Association of State and Highway Transportation Officials (AASHTO) document A Policy on Geometric Design of Highways and Streets, and the Caltrans Highway Design Manual. The program is a CADD based program that simulates low speed turning maneuvers for highway vehicles. The program is used to define vehicle tire tracking and sweep paths in order to design roadway features to meet minimum design vehicle constraints. For the study location the aerial photograph was imported into a CADD file. AutoTURN was then superimposed over the aerial photograph to simulate the projected turning paths for a CA-Legal vehicle. These paths were then used to determine whether any overtracking occurred. The pathways are attached for each of the turning movements studied. The bullet points below highlight the effects of a CA-Legal truck on the turning movements studied. o Eastbound Weber Avenue to Southbound Filbert Street(Figure 1) Trucks encroach onto adjacent sidewalk in southwest quadrant while remaining within southbound lane o Northbound Filbert Street to Westbound Weber Avenue (Figure 2) - Trucks can make on Weber Avenue; limit line should be added along Weber Avenue about 5' in front of existing crosswalk. This will allow trucks to make turn if other vehicles are queued along Weber Avenue - No parking required along north side of Weber Avenue to allow wide sweep of truck o Westbound SR 4 Ramp to Northbound Filbert Street(Figure 3) - Trucks can complete turn - Requires trucks to enter the painted median in advance of the left turn pocket KD Anderson s c e , Inc. 3853 Taylor Road, Suite G e Loomis,CA 95650 • (916)660-1555 • Fax(916)660-1535