Swissmetro

The SwissMetro is a proposed major innovation to the Swiss transport system: an underground mag-lev system to connect the major urban centres in Switzerland. As part of the various assessment studies carried out so far, Abay (1999) conducted a substantial RP/SP survey of longdistance road and rail travellers using a two-stage survey method. First, the respondents were interviewed or observed about a current trip. Based on this trip SP exercises were generated, which the respondent answered in turn. This dataset consists of survey data collected on the trains between St. Gallen and Geneva, Switzerland, during March 1998. The respondents provided information in order to analyze the impact of the modal innovation in transportation, represented by the Swissmetro, a revolutionary mag-lev underground system, against the usual transport modes represented by car and train. The Swissmetro is a true innovation. It is therefore not appropriate to base forecasts of its impact on observations of existing revealed preferences (RP) data. It is necessary to obtain data from surveys of hypothetical markets/situations, which include the innovation, to assess the impact. Survey data were collected on rail-based travels, interviewing 470 respondents. Due to data problems, only 441 are used here. Nine stated choice situations were generated for each of 441 respondents, offering three alternatives: rail, Swissmetro and car (only for car owners). A similar method for relevant car trips with a household or telephone survey was deemed impractical. The sample was therefore constructed using license plate observations on the motorways in the corridor by means of video recorders. A total of 10529 relevant license plates were recorded during September 1997. The central Swiss car license agency had agreed to send up to 10000 owners of these cars a survey-pack. Until April 1998, 9658 letters were mailed, of which 1758 were returned. A total of 1070 persons filled in the survey completely and were willing to participate in the second SP survey, which was generated using the same approach used for the rail interviews. 750 usable SP surveys were returned, from the license-plate based survey.瑞士超级高铁（SwissMetro）是一项针对瑞士交通系统的重大创新性提案：即用于连接瑞士各主要城市中心的地下磁悬浮交通系统。截至目前开展的各类评估研究中，Abay（1999）采用两阶段调查方法，针对长途公路与铁路旅客开展了大规模的显示偏好（Revealed Preference, RP）/陈述偏好（Stated Preference, SP）调研。第一阶段，研究人员对受访者当前的出行行为进行访谈或观察；基于此次出行生成陈述偏好情境问卷，由受访者依次作答。本数据集采集自1998年3月期间，往返于瑞士圣加仑（St. Gallen）与日内瓦（Geneva）的列车上的调研数据。受访者提供的相关信息，用于分析以瑞士超级高铁（SwissMetro）为代表的革命性地下磁悬浮交通创新模式，相较于以私家车与铁路为代表的常规交通模式的影响。瑞士超级高铁属于全新的交通创新模式，因此无法仅基于现有显示偏好（RP）数据对其影响进行预测，必须通过包含该创新模式的假想市场/情境调研获取数据，以评估其影响。研究人员针对铁路出行群体开展调研，共访谈470名受访者，受数据质量问题影响，最终仅使用其中441份有效样本。研究为每位受访者生成9种选择情境，提供三种出行方案：铁路、瑞士超级高铁（SwissMetro）与私家车（仅针对车主群体）。若采用针对家庭或电话调研的类似方法开展相关私家车出行调研，被认为不具备可行性。因此，研究人员通过录像机记录交通走廊沿线高速公路上的车牌信息，构建私家车受访者样本。1997年9月期间，共记录到10529条有效车牌信息。瑞士中部车牌管理机构已同意向其中10000名车主邮寄调研包。截至1998年4月，共寄出9658封调研邮件，回收1758封。其中1070人完整填写问卷并愿意参与第二轮陈述偏好（SP）调研，该调研沿用铁路访谈的相同方法。基于车牌信息的调研最终回收750份有效陈述偏好问卷。