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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, Parkz�ead (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 Iight-
<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 />Figures 4ct and 4b: The light- � �� ��+��� rx �:�r�n; ��r�cck��,�� _ _ _ , _ _ -- ' ,
<br />• �1� �rn ip� �r�ffir f'i��u I.iCNwi r�# d"� - - - - r -` ` ��� � �i .
<br />trafjc-exposure neighborhood, _ . _ _-- --_ _ � �, �
<br />Gregory Gardens (a), had _ _ _ - �—_ _ - .-- -- — - -� ---- - �I � � �' ���� � ��'�
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<br />�
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