Travel Decision Survey Data 2012

This workbook provides data and data dictionaries for the SFMTA 2012 Travel Decision Survey.
The 2012 Summary Report, with methodology and survey instrument, is located at https://www.sfmta.com/about-sfmta/reports/travel-decision-survey-2012.
Data, methodologies, and summary report for other SFMTA travel decision surveys are available on sfmta.com.
On behalf of San Francisco Municipal Transportation Agency (SFMTA), Corey, Canapary & Galanis (CC&G) undertook a Mode Share Survey within the City and County of San Francisco as well as the eight surrounding Bay Area counties of Alameda, Contra Costa, San Mateo, Marin, Santa Clara, Napa, Sonoma and Solano.

The primary goals of this study were to:
• Assess percent mode share for travel in San Francisco for evaluation of the SFMTA Strategic Objective 2.3: Mode Share target of 50% non-private auto travel by FY2018 with a 95% confidence level and MOE +/- 5% or less.
• Evaluate the above statement based on the following parameters: number of trips to, from, and within San Francisco by Bay Area residents. Trips by visitors to the Bay Area and for commercial purposes are not included.
• Provide additional trip details, including trip purpose for each trip in the mode share question series.
• Collect demographic data on the population of Bay Area residents who travel to, from, and within San Francisco.
• Collect data on travel behavior and opinions that support other SFMTA strategy and project evaluation needs.

The survey was conducted as a telephone study among with approximately 750 Bay Area residents aged 18 and older. Interviewing was conducted in English, Spanish, and Cantonese. Surveying was conducted via random digit dial (RDD) and cell phone sample.
This dataset incorporates respondent weighting based on age and home location; utilize the “weight” field when appropriate in your analysis.

The survey period for this survey is as follows:
2012: October 2012 – January 2013
The margin of error is related to sample size (n). For the total sample, the margin of error is 3.5% for a confidence level of 95%. When looking at subsets of the data, such as just the SF population, just the female population, or just the population of people who bicycle, the sample size decreases and the margin of error increases. Below is a guide of the margin of error for different samples sizes. Be cautious in making conclusions based off of small sample sizes.

At the 95% confidence level is:
• n = 767 (Total Sample). Margin of error = +/- 3.5%
• n = 384. Margin of error = +/- 4.95%
• n = 100. Margin of error = +/- 9.80%

本工作簿提供了SFMTA 2012出行决策调查的数据和数据字典。2012年总结报告，包括方法论和调查工具，可访问https://www.sfmta.com/about-sfmta/reports/travel-decision-survey-2012。其他SFMTA出行决策调查的数据、方法论和总结报告可在sfmta.com上获取。受旧金山市政交通局（SFMTA）委托，Corey, Canapary & Galanis（CC&G）在旧金山市和县以及八个周边湾区县（阿拉米达县、康特拉科斯塔县、圣马特奥县、马里恩县、圣克拉拉县、纳帕县、索诺马县和索拉诺县）开展了出行方式份额调查。本研究的主要目标是：
• 评估旧金山市出行方式份额的百分比，以评估SFMTA战略目标2.3：到2018财年，非私人汽车出行方式份额达到50%，置信水平为95%，最大误差范围（MOE）为±5%或更少。
• 基于以下参数评估上述陈述：湾区居民前往、离开和位于旧金山市的出行次数。不包括前往湾区参观者和商业目的的出行。
• 提供额外的出行细节，包括出行方式问题系列中每次出行的目的。
• 收集关于前往、离开和位于旧金山市的湾区居民人口统计学数据。
• 收集支持其他SFMTA战略和项目评估需求出行行为和意见的数据。
调查以电话调查的形式进行，调查对象为大约750名年龄在18岁以上的湾区居民。访谈以英语、西班牙语和粤语进行。调查通过随机数字拨号（RDD）和移动电话样本进行。
此数据集包含了基于年龄和居住地进行的受访者加权；在分析时，根据需要使用“权重”字段。
本次调查的时间范围为：2012年：2012年10月 - 2013年1月
误差范围与样本大小（n）相关。对于总体样本，置信水平为95%时的误差范围为±3.5%。当查看数据子集时，例如仅针对旧金山市人口、仅针对女性人口或仅针对骑自行车的人口，样本大小会减少，误差范围会增加。以下是不同样本大小的误差范围指南。在基于小样本大小得出结论时要谨慎。
在95%的置信水平下：
• n = 767（总体样本）。误差范围 = ±3.5%
• n = 384。误差范围 = ±4.95%
• n = 100。误差范围 = ±9.80%