Roadze puts 51,045 public traffic cameras from 46 state transportation departments on a single map. Check the road before you drive: traffic, weather, construction and closures, straight from the same cameras the DOTs use — free, and without an account.
Every camera is re-checked against its transportation department once a day, so the ones that go dark disappear instead of sitting here as broken thumbnails. 267 highways and 122 metro areas have their own page, with the roads that cross them and what the weather usually does to driving there.