"low shoulder" sign area. back view of suv stopped on shoulder. the shoulder and travel lane elevation difference.

difference regulation elevation shoulder template stopped driving traffic travel vector rules sign area back view lane safe tips flat low suv alert american asphalt auto automobile car cartoon clipart curve definition difference school edge elevation expressway flat freeway grade gravel height lane low meaning motorway mud packed dirt path pavement place risk road round shoulder sign signage soft space street striped symbol traffic transport travel unpaved vector vehicle warning zone