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<br />The cognitive mapping exercise we conducted in Contra Costa County, California, <br />is a dramatic illustration of these findings. In order to gauge the effect of traffic, we <br />chose two residential neighborhoods with elementary schools, Parkmead (heavy-traffic- <br />exposure) and Gregory Gardens (light-traffic-exposure). The communities were similar <br />in most respects, except for their exposure to traffic volumes and speed. The light- <br />traffic-exposure (Light TE) neighborhood, had about half the amount of traffic as the <br />heavy-traffic-exposure (Heavy TE) neighborhood and the cars traveled at lower speeds <br />(because of drainage swales that provided informal traffic calming). In addition, the <br />Light TE neighborhood had good pedestrian facilities in key locations, and the traffic it <br />did have was not as centrally located. (See Figures 4a and 4b) <br /> <br />Figures 4a and 4b: The light- <br />traffic-exposure neighborhood, <br />Gregory Gardens (a), had <br />about half the amount of traffic <br />as the heavy-traffic-exposure <br />neighborhood, Parkmead (b), <br />and the cars traveled at lower <br />speeds. <br /> <br />~~~~~~ ~~~~~~b~~~~a~:~~""""mmmmma'==~} \ <br />~L--::-~~~=--- ~ \ \ <br />-~)._--'- GregOl'Y Garll.", \\nil::l '~\\ <br />oS Elementar,'l'School <br />~ \ <br /> <br />~i ~ ,.~" ~ .jr , <br />I .~ 0 I \'f <br />\:Ii n. g )> . " o' ~y.!.~.!1r', _._...n \ \~ <br /> <br />,', . \ Jennie Dr \ <br />I " Pedestrian . \ <br /> <br />i . Bieyell,' 17 :~' / ...............~m. . _!~ __mmi:.$' Ivla 01.' 1 <br />-- Automobilos i,l / 3 <br />N II' -I!} ~\ '0 ml!!!i!!OLmm_...."" .-. <br />A ~ i/~ ~... __..:ynthlaOI. <br />6 <br /> <br /> <br /> <br />8 NCBW Forum Article 3-7-05- March 2005 <br />