mandatory keep right or left hand side drive obstacle detour road sign, european union eu traffic safety barrier signage

accident arrows attention barricade barrier block blocked blue caution closed closeup concept danger detailed detour diagonally drive driving european hand highway icon info isolated keep lane large left mandatory marking metal obstacle pattern pole post red regulatory reroute right road roadside roadsign roadworks round route safety shield side sign signage signal signalling signpost street striped symbol traffic union vertical warning way white works zone