A2: Snowplows

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The city of Ann Arbor’s new snow plow tracking user interface for the Internet was up and running on Jan. 1 and showed five trucks out spreading salt/sand mixture at least from 8 p.m. past midnight. Features of the user interface include mouseover info for vehicle icons [screenshot], various zoom levels [screenshot], and  status of vehicle conveyed through icon (e.g., ignition off at Wheeler Service Center re-loading salt/sand) [screenshot] [Source]