in the middle of the road leading to the residential area, the police and the traffic office installed a red plastic retarder. rai

area arrows asphalt attached barrier black bump bumper bumpy car center city control danger drive driveway frost icing installed jump leading limit low meadow middle obstacle office outdoor pedestrian plastic police rai ramp red residential retarder road roadblock roadway rubber safety shape slow speed speedbump square street strip stripe sunny surface tarmac traffic urban vehicle warning white