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Sep 22, 2004 Austin Commuter Survey: Findings and Recommendations Dr. Chandra Bhat The University of Texas at Austin Note: This presentation is in slideshow mode. Please follow the and buttons.
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THE CONTEXT An average Austin area rush hour commuter spends 50 hours annually just sitting in traffic and takes 30% longer to get from point A to point B. Traffic delay per rush hour traveler has risen by 250% in the past decade in Austin Need to design and implement bold, creative, coordinated and proactive strategies
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Congestion alleviation strategies may be broadly grouped into the following categories: Increase supply/vehicular carrying capacity of roadways Influence vehicular traffic patterns Change commuter travel patterns Accurate analysis of the potential effectiveness of these strategies is critical This requires examination of commuter travel behavior – commute periods being the most congested times of the weekday
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REPORT OBJECTIVES Examine demographic, employment and overall travel characteristics of Austin area commuters and analyze how these characteristics impact commute travel choices and perceptions Develop a framework for evaluating the effect of alternative strategies on commute mode choice to enable policy analysis Highlight the need to identify and implement a coordinated, balanced, multi-modal, and integrated land use-transportation plan to control traffic
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AUSTIN COMMUTER SURVEY (ACS) Endorsed by Clean Air Force (CAF) of Central Texas and supported by NuStats Inc. Web-based survey hosted by UT Austin Publicity and recruitment CAF email messages to Austin area employers Radio and TV media Austin Chamber of Commerce article in newsletter Color posters at strategic public places Posters handed out to individuals at public locations
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SURVEY CONTENT Screening Introduction and Travel opinions Work-related characteristics Commute travel experience by: DriveShare-ride BusWalkBicycle Stated preference games Demographic data Commute and midday stop-making
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DATA PREPARATION Geo-coded home and work locations Overlaid geo-coded locations with CAMPO’s zonal configuration to assign appropriate zones Appended LOS attributes to each individual’s record – extracted from CAMPO’s network skims Ensured consistency through several cleaning and screening steps Final sample 699 commuters who reside and work within 3-county area of Hays, Williamson and Travis699 commuters who reside and work within 3-county area of Hays, Williamson and Travis Weighted by race, income, gender, household size, household type and commute travel mode choiceWeighted by race, income, gender, household size, household type and commute travel mode choice
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DEMOGRAPHIC AND SOCIO- ECONOMIC CHARACTERISTICS Household characteristics Individual characteristics Demographic characteristics Socio-economic characteristics Work characteristics
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COMMUTE TRAVEL CHARACTERISTICS Travel Perceptions Commute Distance Nonwork stops Commute Mode Commute Duration Commute Time-of-Day
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CONCLUSIONS Increasing diversity of household structures – increasing participation in nonwork activities during commute and midday It is important to pursue an integrated and coordinated land-use and transportation plan to address congestion problems Addressing traffic congestion problems requires a balanced and multimodal transportation plan – infeasible to even maintain today’s congestion levels into the future by focusing on only one strategy The “Big Picture” Findings
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CONCLUSIONS Need to also focus attention on modifying work arrangements as a means to alleviating congestion – currently only 2.5% of the commuters telework on any given day Reliability of travel time plays an important role in commute mode choice decisions – particularly for commuters with an inflexible work schedule Overall, several Austin area employees do enjoy the routine of traveling to their work place
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CONCLUSIONS Commuters have a more positive image of a potential CRT mode than the current bus mode Percentage of commuters using a potential CRT system will be dependent upon the service characteristics; under assumptions that are not unreasonable, a new CRT mode is predicted to capture 1.5% of overall mode share if 10% of the commuter population have access to CRT and 4.1% of overall mode share if 25% of the commuter population have access to CRT Within the group of individuals for whom CRT is an available alternative, CRT is predicted to capture about 15% of the mode share Specific Findings on Commuter Rail and Tolls
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CONCLUSIONS Tolls on highways can be expected to lead to a drop of about 2.5% in the DA mode share on highways for each $1 toll A $1 toll for the use of all the major highways in the Austin area would lead to a 1.5% reduction in DA mode share across the entire Austin metropolitan area The average commuter is willing to pay $12 for an hour of commute time savings
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CONCLUSIONS The household structures of Austin area commuters are rather diverse - only 13% of commuter households are “traditional” family households The average household income ($65,700) is higher than the national average ($58,000) A large number of commuters have internet access at home (84%) Average motorized vehicle ownership level of 2 per household Other Findings about Austin Area Commuters
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CONCLUSIONS Key facts about Austin area commuters : 67% white, non-Hispanic; 16% Hispanic 57% male avg. personal income $44,650 primarily full-time employed start work 7-9 AM, end work 4-6 PM 10% telework at least occasionally 42% have inflexible work schedules in both arrival & departure; 30% have a flexible work schedule in both arrival & departure majority of the commuters (72%) live within 15 miles from work Net result of high incomes and car ownership, diverse household structures and increased commute/midday stop- making is high DA mode shares
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THANK YOU!
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Household size and structure Distribution of household size Distribution of household types 2-person hhs 3 and 4 person hhs
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Household income Low income < $35,00032% Medium income $35,000-$95,00048% $35,000-$95,00048% High income > $95,00020%
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Housing characteristics Distribution of housing tenure type Distribution of residence type
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Residential location
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Internet access from residence
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Motorized vehicle ownership Average vehicle ownership by residence zone population density Average vehicle ownership by income level Auto-ownership of commuters
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Motorized vehicle type and age Average age of vehicles by vehicle type Vehicle types owned by commuter households Vehicle types used for commute
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Demographic characteristics Gender of the commute population Racial composition of the commute population Age distribution of commuters Marital status of commuters
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Socio-economic characteristics Distribution of highest level of education Distribution of personal income
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Work characteristics Length of time working in Austin Employer type Employment status
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Work start time distribution
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Work end time distribution
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Work schedule flexibility Work start time flexibility Work end time flexibility
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Teleworking percentages Part-time employed Full-time employed Educational Instit. Non-educational Instit. Flexible arrival and/or departure times Inflexible arrival and/or departure times
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Travel perceptions Perception of level of congestion during commute Characterization of the commute trip
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Perception of level of congestion by commute distance Short Commute (≤7 miles) Highway not used Highway used Long Commute (>15 miles)Medium Commute (7.01 – 15 miles) Long Commute (>15 miles)Medium Commute (7.01 – 15 miles)Short Commute (≤7 miles)
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Characterization of commute trip by commute duration Short Commute (≤7 miles) Highway not used Highway used Long Commute (>15 miles)Medium Commute (7.01 – 15 miles) Long Commute (>15 miles)Medium Commute (7.01 – 15 miles)Short Commute (≤7 miles)
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Travel perceptions Ease of travel to non-work activities around home
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Commute distance Distribution of commute distance
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Nonwork stops – weekly Distribution during morning commute Distribution during evening commute Distribution of weekly commute stop-making
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Non-home trips Return home trips Distribution of weekly midday stop-making
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Commute stop-making Midday stop-making Degree of stop-making during the week
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Nonwork stops - daily Distribution of number of activity stops
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Distribution of stop-making by purpose and time period
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Commute mode Distribution of mode use over the week
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Commute mode choice on most recent work day
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Mode split by weekly commute stop-making propensity Mode split by weekly midday stop-making propensity
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Important results from Bhat and Sardesai (2004) The ability of auto-use disincentives and hov incentives to shift commuters away from driving to car/van-pooling and transit modes will be overestimated if the impact of commute and midday stop-making is ignored Commuters are not only concerned about average travel time but also about the reliability of travel time The average commuter is willing to pay $12 for an hour of commute savings Commuters have a more positive image of a potential CRT mode than the current bus mode
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Important results from Bhat and Sardesai (2004) contd… The presence of a grocery store around potential CRT stations acts as an impetus for CRT mode use; however, the presence of a child care center does not provide any stimulation A new CRT mode is predicted to capture 4.1% of the overall mode share (2.6% from DA) Within the group of individuals for whom CRT is an available alternative, a shift of 15% from driving to CRT is projected Tolls on highways can be expected to lead to a drop of about 2.5% in the DA mode share on the highways for each $1 toll
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Commute duration Commute durations by mode
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Commute Time-of-Day Distribution of the time of the morning commute Distribution of the time of the evening commute
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