Security experts say it is pretty clear that the law empowers police to demand that phone companies hand over traffic information.
安全专家表示，显然法律规定警察有权要求通讯公司交出通讯信息。
Such information can be collected via traffic helicopters, roadside cameras, police patrols, sensors embedded in roads, tracking units in vehicles, data from public transport turnstiles and surveys.
可以利用交通直升机、路旁相机、巡警、道路内嵌传感器、车载追踪单元、公共交通十字转门及调查方法采集获得。
Every "green shield" has an only serial number registered in operation management system. Traffic police can find out targeted taxi's information within 50-80m through the "green shield".
每个“绿盾”内都有与运政管理系统相对应的唯一编号，交通执法部门可以通过车载读写器就可以在50到80米外稳定读取车内“绿盾”的信息。
TIPS : Traffic Information Planning System (Illinois State Police for Radio Codes;
Incident Disposition）交通信息规划体系（伊利诺州警方对无线电代码；
TIPS : Traffic Information Planning System (Illinois State Police for Radio Codes;
Incident Disposition）交通信息规划体系（伊利诺州警方对无线电代码；
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