Traffic Count Vehicle Classification 2014-2017

The City of Melbourne employs a contractor to perform traffic counts on roads throughout the municipality. The numbers of vehicles are recorded per hour and split into 12 categories based on the Austroads vehicle classification. Vehicle class 13 is used when the type of vehicle can’t be determined.\n\nIn the 2017/16 surveys all bikes, motorcycles and maximum speeds were captured. In the 2015 surveys not all surveys captured bikes, motorcycles and maximum speed. In the 2014 surveys no bikes, motorcycles or maximum speed were captured.\n\nThis data is designed to be joined to the road corridor data on road_segment and seg_id. Some records have more than one road segment this is because the survey crosses intersecting roads and the intersections have a road segment number. In the Road corridor table some road segments will have the same seg_id.\n\n\nFor a description of each field please see the attached data dictionary.\n\nKnown data issues:\n- 112 records had vehicle_class fields which contained the character '-'. This should value should be a 0 value.

墨尔本市（City of Melbourne）委托承包商对市政管辖范围内的所有道路开展交通流量统计工作。统计数据按小时记录车辆通行数量，并依据Austroads（澳大利亚道路协会）的车辆分类标准划分为12个类别；当无法识别车辆类型时，将其归类为13类车辆。

在2017/16年度的调查中，所有自行车、摩托车相关数据及最高限速信息均被完整采集；2015年度的调查未完整采集上述三类信息；2014年度的调查则未采集任何自行车、摩托车及最高限速相关数据。

本数据集可通过road_segment（道路路段）与seg_id（路段编号）字段与道路走廊数据集进行关联。部分记录对应多个道路路段，原因在于该调查覆盖了交叉路口，而交叉路口本身带有专属路段编号。需注意，道路走廊数据表中存在部分道路路段拥有相同seg_id的情况。

各字段的详细说明请参阅附件所附的数据字典。

已知数据问题：
- 共计112条记录的vehicle_class（车辆类别）字段包含字符“-”，该字段的有效值应为0。