TRAVEL CHARACTERISTICS OF TWO SAN DIEGO SUBDIVISION DEVELOPMENTS

AN ORIGIN-DESTINATION STUDY OF TWO SAN DIEGO SUBDIVISION DEVELOPMENTS WAS MADE IN AN EFFORT TO DEVELOP RELATIONSHIPS BETWEEN LAND USE AND TRAFFIC GENERATION, AND TO STUDY THE ORIENTATION OF THE GENERATED TRAFFIC. THE SMALLER OF THESE STUDY SUBDIVISION DEVELOPMENTS CONTAINED 1,822 SINGLE FAMILY DWELLING UNITS AT THE TIME OF THE SURVEY, AND THE LARGER CONTAINED 7,158 OCCUPIED DWELLING UNITS, OF WHICH 4,296 WERE SINGLE FAMILY, 1,838 WERE DUPLEXES, AND 1,024 WERE APARTMENTS. BOTH SUBDIVISIONS HAD PLANNED SHOPPING AREAS WHICH WERE PARTIALLY DEVELOPED AT THE TIME OF THE SURVEY. IN ADDITION TO A HOME INTERVIEW SURVEY, A CORDON LINE WAS ESTABLISHED AROUND EACH STUDY AREA AND 100 PERCENT OF THE OUTBOUND NON-RESIDENTS WERE INTERVIEWED AS WERE ALL OF THE OUTBOUND TRANSIT RIDERS. A SCREEN LINE CHECK OF 95.8 PERCENT WAS OBTAINED IN THE LARGER. VEHICLE OWNERSHIP IN BOTH STUDY AREAS WAS FOUND TO BE 1.22 VEHICLES PER DWELLING UNIT. TRIP GENERATION DATA WAS DEVELOPED PER DWELLING UNIT FOR 5-DAY, 7-DAY AND WEEKEND TRIP TYPES BY TYPE DWELLING UNIT. INTRAZONAL TRIPS WERE RELATED TO AREA WEEKDAY AND WEEKEND AUTO-TRUCK TIP PURPOSES WERE STUDIED AND TRIP PURPOSE TIME PROFILES DEVELOPED. THE POSSIBILITY OF FORECASTING FUTURE TRIPS USING THE A.M. PEAK PERIOD WORK TRIP AND PROJECTING BY THE RELATION OF THE WORK TRIP TO ALL TROPS WAS INVESTIGATED. THE A.M. PEAK PERIOD WORK TRIPS AND THE TOTAL OF THE WORK AND RELATED BUSINESS TRIPS OF THE TWO STUDY SUBDIVISIONS APPEARED TO BE STABLE, ALTHOUGH THE PROBLEM OF SAMPLE SIZE WAS NOTED. FREEWAY USAGE WAS STUDIED, AS A FURTHER EXPERIMENT IN THE ACCURACY OF PROJECTING THE A.M. PEAK PERIOD VOLUMES, IT APPEARS THAT THE A.M. PEAK HOUR VOLUME COULD BE USED TO EXPAND FREEWAY TYPE TRIPS IN AREAS SIMILAR IN SIZE TO THOSE STUDIED WHEN THE TRIP LENGTH IS UNDER FIVE OR SIX MILES. THE ORIENTATION OF THE GENERATED TRIPS, BOTH AUTO-TRUCK AND TRANSIT, IS SHOWN BY DESIRE LINE CHARTS AND TRIP LENGTH DISTRIBUTION CURVES. THE WORK TRIP WAS ALSO STUDIED IN TERMS OF ITS TRIP LENGTH DISTRIBUTION. CLOSE RELATIONSHIPS WERE OBSERVED BETWEEN THE TWO STUDY SUBDIVISONS IN THE TRIP PURPOSE ANALYSES OF TRIP LENGTH. THESE STUDIES DEVELOPED USEFUL TRIP GENERATION DATA BY TYPE DWELLING UNIT. THE RELATION OF TRIP GENERATION AND ORIENTATION TO LAND USE APPEARED IN SEVERAL OF THE ANALYSES, THUS SUGGESTING THAT CONSISTENT RELATIONSHIPS BETWEEN LAND USE AND TRAVEL CHARCTERISTICS DO EXIST. /AUTHOR/