Driver Feedback Sign - DFS005

Driver Feedback Sign DFS005

Latitude: 53.544395
Longitude: -113.557596

The City has a number of Driver Feedback Signs (DFS) installed around the city. These units collect data as traffic approaches them and in some cases may display a message or a speed that is being detected. Also, these units are radar based and can only track one vehicle at a time (strongest signal).

Due to the number of DFS installations combined with the volume of data collected, each DFS has its own dataset.

Details of how the data is collected by the DFS are as follows:
- Data is accumulated and reported in 15 minute intervals
- Vehicle speeds are captured/reported in speed intervals (bins)
- Speed range/interval for the bins are determined by parameters/settings set for the DFS (Minimum/Maximum Speed Detection Setting)
- Two speed values are recorded for every vehicle - a Highest Speed Detected and a Slowest Speed Detected (explaining why there are two vehicle counts)
- The bins go from Bin 1 to Bin 10. Bin 1 can also be referred to a LO BIN and Bin 10 can also be referred to as HIGH BIN.

Things to note:

DFS devices are not to be used as or confused with traffic counters, as they are not.
DFS devices have a minimum detectable speed of approximately 6 km/hr.
DFS devices have a maximum (theoretical) detectable speed of approximately 225 km/hr.
DFS devices are programmable with different parameters that can also follow a timed schedule.

驾驶员反馈标志 DFS005

纬度：53.544395
经度：-113.557596

本市在城市各处安装了若干驾驶员反馈标志（DFS）。这些装置在交通接近时收集数据，并在某些情况下会显示检测到的消息或速度。此外，这些装置基于雷达技术，每次只能追踪一辆车辆（信号最强）。由于DFS安装数量众多以及收集的数据量庞大，每个DFS都拥有独立的数据库。

DFS装置收集数据的详细信息如下：
- 数据以15分钟为间隔进行累积和报告
- 车辆速度以速度区间（桶）进行捕捉和报告
- 桶的速度范围/区间由DFS装置设定的参数/设置（最小/最大速度检测设置）决定
- 每辆车记录两个速度值——最高检测速度和最低检测速度（解释了为何存在两个车辆计数的原因）
- 桶从桶1至桶10编号。桶1也可称作低桶，桶10也可称作高桶。

注意事项：
DFS装置不应作为或与交通计数器混淆使用，因为它们并非。
DFS装置的最低可检测速度约为6公里/小时。
DFS装置的最大（理论）可检测速度约为225公里/小时。
DFS装置可编程，具有不同的参数，并可按照时间表进行调度。