Site data collection also included gathering information about the site and its surroundings. Figure 2-8 is the form used for recording site data. Some of the entries were sourced from technical references (e.g., land use and area codes), some came from site property managers (e.g., building occupancy), some came from field observations or measurements (e.g., average setbacks), and some came from GIS or other Internet sources (e.g., transit schedules). Sample Sizes 2-3 shows the sample sizes and rates for each of the sites for both AM and PM peak periods. The data presented is usable interviews those for which enough information was – obtained to provide information about the trip mode(s) of travel and vehicle occupancy if the respondent walked to a vehicle parked off-site and then drove. The two right columns show the percent of total pedestrians entering and leaving the site from which usable interviews were obtained. For the 32 sites combined, usable interviews were obtained from 48 percent of walking cordon crossings in the AM peak period and 44 percent in the PM peak period. Those percentages varied by site, ranging from a low of 18 percent to a high of 100 percent. The research team had set a target of 50 or more usable interviews at each site for each peak period. A few had total peak period pedestrian counts lower than 50. For those sites where the peak period usable interviews were below 50, the usable interviews represented less than 25 percent of the total pedestrians at only one site. As has been stated previously, the interview data were used only to split walking access trips into walk, transit, and bicycle trips. Trips by motor vehicle (driver, passengers) were determined in most cases by direct counts at site driveways; for those trips the sample rate was 100 percent. Hence, for a hypothetical site, if there were 30 percent non-vehicle trips and the sample rate for those was 40 percent, then 12 percent of all trips were reported in interviews (30 percent times 40 percent) and the 70 percent that were vehicle trips would all be represented by counts, yielding a total of 82 percent of all trips having modes directly reported. More information about the survey data is reported in Chapter 3. Brief descriptions of each Phase 2 survey site are contained in Appendix A of this report.
Site data collection also included gathering information about the site and its surroundings. Figure 2-8 is the form used for recording site data. Some of the entries were sourced from technical references (e.g., land use and area codes), some came from site property managers (e.g., building occupancy), some came from field observations or measurements (e.g., average setbacks), and some came from GIS or other Internet sources (e.g., transit schedules). Sample Sizes 2-3 shows the sample sizes and rates for each of the sites for both AM and PM peak periods. The data presented is usable interviews – those for which enough information was obtained to provide information about the trip mode(s) of travel and vehicle occupancy if the respondent walked to a vehicle parked off-site and then drove. The two right columns show the percent of total pedestrians entering and leaving the site from which usable interviews were obtained. For the 32 sites combined, usable interviews were obtained from 48 percent of walking cordon crossings in the AM peak period and 44 percent in the PM peak period. Those percentages varied by site, ranging from a low of 18 percent to a high of 100 percent. The research team had set a target of 50 or more usable interviews at each site for each peak period. A few had total peak period pedestrian counts lower than 50. For those sites where the peak period usable interviews were below 50, the usable interviews represented less than 25 percent of the total pedestrians at only one site. As has been stated previously, the interview data were used only to split walking access trips into walk, transit, and bicycle trips. Trips by motor vehicle (driver, passengers) were determined in most cases by direct counts at site driveways; for those trips the sample rate was 100 percent. Hence, for a hypothetical site, if there were 30 percent non-vehicle trips and the sample rate for those was 40 percent, then 12 percent of all trips were reported in interviews (30 percent times 40 percent) and the 70 percent that were vehicle trips would all be represented by counts, yielding a total of 82 percent of all trips having modes directly reported. More information about the survey data is reported in Chapter 3. Brief descriptions of each Phase 2 survey site are contained in Appendix A of this report.
CaltransSGTGFinalreport_041917.docx