The field surveys involved questionnaire-guided interviews with the users of two sites on the UCSD campus (near 32.88ºN, 117.24ºW),
one a key node for vehicular traffic and public transportation (TS) and the other a construction site (CS), where road surfacing work was conducted, bordering a park on one side and built up areas on the other. The two sites were about 750 m apart along a NNW–SSE axis,about 1500 m east of the Pacific Ocean