The term 'Road Runner' is a reference to the cartoon character of the same name. The crossword solutions for this term are CAR (3 letters), IMA (3 letters), AUTO (4 letters), TIRE (4 letters), BEEPBEEP (8 letters), and RADIALTIRE (10 letters). CAR stands for 'AUTOMOBILE, ' IMA stands for 'IMAGE, ' AUTO stands for 'AUTOMOBILE, ' TIRE stands for 'rubber wheel, ' BEEPBEEP stands for the sound Road Runner makes, and RADIALTIRE stands for 'a type of TIRE with cords running at angles across the tread.'