A assume all drivers will drive at 25 mph. B see how fast other vehicles are moving. C assume the posted recommended speed is the maximum safe speed for this part of the road. D none of the above. 12. Margins of safety are A needed to allow adequate visibility, time, and space to maneuver your vehicle. B not affected by traffic conditions. C needed to correct defective vehicle equipment. D none of the above. 13. Driving on residential streets often presents special hazards because A the streets usually handle a lot of traffic. B traffic usually moves in only one direction. C pedestrians may move in the path of vehicles. D none of the above. 14. When driving on rural roads, you should A pass slow-moving vehicles that are very wide while on a curve so you will have more room. B be prepared to drive at a higher speed because there are fewer intersections. C use sound judgment when approaching railroad crossings because there may be no signs, signals, or gates. D none of the above. 15. When sharing the roadway with cyclists, A expect that cyclists will be more visible when they travel in bike lanes. B drive with headlights on, signal when turning, changing lanes, or stopping. C blow your horn so the cyclist will move. D none of the above. 16. An example of jaywalking is when A pedestrians are distracted when crossing a street. B people lose control of their skateboards. C pedestrians walk into the street from between parked vehicles. D none of the above. 17. To avoid colliding with the vehicle in front of you, A allow enough time and space to see and react if a problem occurs. B move to another lane of traffic. C apply your brakes if you see the brake lights of the vehicle in front of you. D none of the above. 18. Hydroplaning is dangerous because A your tires lose contact with the road. B your tires get stuck in the mud. C your vehicle skids out of control. D none of the above. 19. Environmental factors that cause the most problems for drivers include A poor street lighting. B rain, snow, and fog. C the angle of the sun. D none of the above. 20. Vehicle engines fail most often because of A lack of fuel and water. B broken belts or a malfunctioning fuel or electrical system. C driving too fast or too slow on the roadway. D none of the above. 21. Being fatigued when you drive may cause you to A miss critical information. B be more mindful of driving rules. C drive late at night. D none of the above. 22. If you have been drinking alcohol, your driving ability is affected in that A your chances of dying in a crash are decreased because your body is limber. B your BAC is raised only when you consume alcohol on an empty stomach. C your ability to process information and make critical decisions is impaired. D none of the above. 23. The main purpose of your vehicle's lubricating and cooling systems are designed to keep A the metal parts of your vehicle's engine will not rub against each other and overheat. B your vehicle's system of circulating liquids can help absorb, diffuse, and carry away the excess engine heat. C the vehicle's heating and air-conditioning system will keep you comfortable. D none of the above. 24. Older drivers can compensate for declining physical conditions by A wearing sunglasses and hearing aids. B using experience to help reduce risk, allow more time to get to destination, and changing their travel routes. C driving vehicles equipped with special lighting features. D none of the above.