Question Passing is prohibited: Answers Within 100 feet of an intersection or railroad crossing. If the vehicle you are following has a slow-moving vehicle symbol. When using the right lane to pass a left-turning vehicle. Explanation It is against the law to pass any vehicle within 100 feet of a railroad crossing or intersection. Only pass where it is safe and legal to do so. Pass your DMV Written Test with flying colors Take me to the cheat sheet Iowa This questions appears in the following tests: Iowa Practice Test 28 Iowa Practice Test 14