![What is this black round thing on the roof of this transit company van? It was spinning fast. : r/whatisthisthing What is this black round thing on the roof of this transit company van? It was spinning fast. : r/whatisthisthing](https://external-preview.redd.it/srFjPkvF_1Ji90VF6xh2uEWiQfEW3sTHzsXHu4i0Kc0.jpg?auto=webp&s=bbc7ce94a0920ef3ec72d02f2f0a3219d97ddf21)
What is this black round thing on the roof of this transit company van? It was spinning fast. : r/whatisthisthing
![Amazon.com: iMunir Fishing Pole Rack Rod Storage Holder Strap Belt Adjustable for Truck Vehicle SUVs Wagons and Vans : Sports & Outdoors Amazon.com: iMunir Fishing Pole Rack Rod Storage Holder Strap Belt Adjustable for Truck Vehicle SUVs Wagons and Vans : Sports & Outdoors](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/513LEr6dxPL._AC_UF894,1000_QL80_.jpg)
Amazon.com: iMunir Fishing Pole Rack Rod Storage Holder Strap Belt Adjustable for Truck Vehicle SUVs Wagons and Vans : Sports & Outdoors
![What is this black Spinning thing on top of big black van? Ot speeds up and slows down, relative to the vehicle speed. I though maybe self driving radar, but maybe just What is this black Spinning thing on top of big black van? Ot speeds up and slows down, relative to the vehicle speed. I though maybe self driving radar, but maybe just](https://i.redd.it/wfc65xdyhct11.jpg)
What is this black Spinning thing on top of big black van? Ot speeds up and slows down, relative to the vehicle speed. I though maybe self driving radar, but maybe just
![What is this round spinning thing on the back of a utility truck? It only spun when the van was moving. : r/whatisthisthing What is this round spinning thing on the back of a utility truck? It only spun when the van was moving. : r/whatisthisthing](https://i.redd.it/px9ajr2h56b11.jpg)
What is this round spinning thing on the back of a utility truck? It only spun when the van was moving. : r/whatisthisthing
![Tyler Coward 🇺🇸 on Twitter: "Oh hello “Totally not an FBI spy van outside of my apartment.” Good to see you. (The thing circled in green was spinning!) https://t.co/KIn9eLc0IX" / Twitter Tyler Coward 🇺🇸 on Twitter: "Oh hello “Totally not an FBI spy van outside of my apartment.” Good to see you. (The thing circled in green was spinning!) https://t.co/KIn9eLc0IX" / Twitter](https://pbs.twimg.com/media/DlT4wFJXoAUuSuB.jpg:large)