asphalt barrier car Eurospeedway fence grandstand kerbs Lausitzring motor race motorcycle race curbs racecourse racing road side fence street track tribune truck way bike line marks motorbike motorcycle race motorsports pattern pavement race race line racetrack road texture sign sport start starting line target target line arena border competition mark motobike motorcycle pit lane pit walk adrenalin beginn biker challenge contest course crew dangerous event flag getting started go man moto motorracing oschersleben pit crew red red flag signal sports sportsmen starter starter's flag starters flag starting waving board buffer guards obstacle old red and white rescue safety safety first stadium tire tyre used wheel white