"Road flares" refers to portable devices that emit bright and flashing lights, typically used for warning or signaling purposes on roads or highways. Full definition
Make sure you have packed for emergency kits that include road flare. (wannadrive.com)
Although traditional road flares are extremely effective and affordable, they're also quite dangerous. (driversedguru.com)
The piece, titled «Be No More», was constructed during an all - day build with more than 20 tons (40,000 pounds) of dry ice and illuminated with hundreds of road flares. (judychicago.com)