Study guide
Right-of-way rules exist so that two drivers arriving at the same place never have to guess who goes first. This chapter covers who yields at intersections, how to handle pedestrians, emergency vehicles, and school buses, what speed laws actually require, and the mechanics of passing, turning, roundabouts, and railroad crossings.
Right-of-Way at Intersections
Right-of-way is never something you take; the law only tells you when you must yield it. At a four-way stop, the standard rule taught in state handbooks is first to stop, first to go. If two vehicles stop at the same time, the driver on the left yields to the driver on the right. Picture Dana and Marcus arriving at a four-way stop simultaneously, Dana to the left of Marcus: Dana waits, Marcus proceeds. At an uncontrolled intersection, one with no signs or signals at all, slow down and be ready to stop; the same yield-to-the-right rule applies to vehicles arriving at about the same time. A left turn across oncoming traffic is one of the most tested situations: the turning driver must yield to all oncoming vehicles that are close enough to be a hazard, and turn only when a safe gap exists. Other common yield situations follow the same logic of the disadvantaged position yielding: drivers entering a road from a driveway, alley, or private road yield to traffic already on the road; drivers on an unpaved road typically yield where it meets a paved road; and at a T intersection, traffic on the terminating road yields to traffic on the through road. If another driver fails to yield to you, let them go. The examiners' framing is consistent: right-of-way is given, not claimed, and avoiding a crash always outranks being technically correct.
Pedestrians, Emergency Vehicles, and School Buses
Pedestrians in a crosswalk get the right-of-way, and in most states this includes unmarked crosswalks, which are the implied crossings that exist at intersections even without painted lines. A blind pedestrian using a white cane or guide dog gets special legal protection; when in doubt, stop. Never pass a vehicle stopped at a crosswalk, because it may be stopped for a person you cannot see. When an emergency vehicle approaches with lights flashing and siren sounding, pull to the right edge of the road and stop until it passes; do not stop in an intersection, and never follow closely behind it. Every state also has a move-over law: when you approach a stopped emergency or authorized vehicle with flashing lights on the roadside, you must change into a non-adjacent lane if you can do so safely, and if you cannot, you must slow down substantially. The exact vehicles covered and the required speed reduction vary by state. School bus rules are heavily tested. When a bus displays flashing red lights and an extended stop arm, traffic in both directions on an undivided road must stop and remain stopped until the lights stop flashing. On a divided highway with a physical median or barrier, drivers coming from the opposite direction typically do not have to stop, though rules differ by state, and traffic behind the bus must always stop. Flashing yellow lights on a bus mean it is preparing to stop, so slow down and get ready.
Speed Laws: Posted Limits and the Basic Speed Law
There are two layers of speed law, and the test loves the difference between them. Posted limits set the maximum lawful speed under ideal conditions. The basic speed law says you must never drive faster than is safe for the conditions that actually exist, regardless of the number on the sign. If the limit is 55 mph but rain, fog, ice, heavy traffic, or a sharp curve makes 40 mph the safe speed, then driving 55 can be illegal even though it matches the sign. Imagine Priya driving the posted 65 in a downpour and hydroplaning into a guardrail; a citation for violating the basic speed law would be appropriate because she was driving too fast for conditions. States also apply default limits, sometimes called prima facie or statutory limits, that hold where no sign is posted, and these vary by state; residential and business districts commonly default to about 25 to 30 mph, and school zones are lower, often 15 to 25 mph when children are present. Driving too slowly can also be a violation: impeding the normal flow of traffic is illegal in most states, and some highways post minimum speeds. The practical rule is to keep pace with the flow of traffic without exceeding the posted maximum. Remember that the safest speed is not always the limit, and that speed limits are set for dry pavement, good visibility, and light traffic, which is exactly what you often do not have.
Passing, Turning, and Lane Positioning
Pass on the left as the general rule; passing on the right is typically allowed only in limited situations, such as when the vehicle ahead is turning left or when multiple lanes travel in the same direction. Before passing, check mirrors and your blind spot, signal, and make sure you can complete the pass without cutting off the vehicle you passed; a common guideline is to wait until you can see the passed vehicle's headlights, or the whole front of the vehicle, in your rearview mirror before returning to your lane. Never pass where a solid yellow line is on your side of the center line, in a marked no-passing zone, on hills or curves where you cannot see ahead, or within a certain distance of intersections, railroad crossings, bridges, or tunnels; the exact distances vary by state but roughly 100 feet is a common figure. If someone passes you, do not speed up. For turns, get into the proper lane early. A right turn starts and ends in the lane nearest the right curb. A left turn is made from the lane closest to the center line, and in most states you should finish in the lane just right of the center line of the road you enter. Signal continuously before turning; many states require signaling for at least 100 feet in town, and longer at highway speeds. Never swing wide or cut across lanes mid-turn, and never turn from the wrong lane just because it is open.
Roundabouts and Railroad Crossings
A roundabout is a circular intersection where traffic flows counterclockwise around a center island. The rule is simple: slow down on approach and yield to traffic already circulating, which comes from your left. You do not stop unless you need to wait for a gap. Once inside, do not stop and do not pass; large trucks may need extra room, and in multi-lane roundabouts you should choose your lane before entering, generally left lane for left turns or U-turns and right lane for right turns, with through traffic following the posted lane markings. Signal your exit as you approach it, and yield to pedestrians in crosswalks at both entry and exit. Railroad crossings demand a different mindset, because trains cannot stop quickly and are always closer and faster than they appear. A round yellow advance warning sign and a white crossbuck at the tracks mark the crossing; the crossbuck itself functions as a yield sign. When lights flash, gates lower, or a train is visible, stop; a common standard requires stopping no closer than 15 feet and no farther than 50 feet from the nearest rail, though exact distances vary by state. Never drive around lowered gates, never stop on the tracks, and never start across unless you are sure your vehicle can clear the entire crossing, including in stopped traffic. If your vehicle stalls on the tracks with a train coming, get everyone out immediately and move away from the tracks at an angle toward the approaching train, so debris flies past you rather than into you.
Key terms
- Right-of-way
- — The legal privilege to proceed first, which the law requires drivers to yield rather than claim.
- Uncontrolled intersection
- — An intersection with no signs or signals, where drivers slow down and yield to vehicles arriving on the right.
- Unprotected left turn
- — A left turn made without a green arrow, requiring the turning driver to yield to all oncoming traffic that is a hazard.
- Unmarked crosswalk
- — The implied pedestrian crossing that exists at an intersection even where no lines are painted.
- Move-over law
- — A law in every state requiring drivers to change lanes away from, or slow down for, stopped emergency and authorized vehicles with flashing lights.
- Basic speed law
- — The rule that you may never drive faster than is safe for current conditions, even if you are at or below the posted limit.
- Prima facie speed limit
- — A default speed limit that applies in certain areas, such as residential districts, when no limit is posted.
- No-passing zone
- — A stretch of road, marked by a solid yellow line on your side or a pennant sign, where passing is prohibited.
- Roundabout
- — A circular intersection where entering traffic yields to counterclockwise circulating traffic coming from the left.
- Crossbuck
- — The white X-shaped railroad crossing sign that legally functions as a yield sign at the tracks.
Exam tips
- When two vehicles stop at a four-way stop at the same time, the answer is almost always: yield to the driver on your right. Test writers rarely reward any answer that involves claiming right-of-way.
- Left-turn questions are traps for impatience: the left-turning driver yields to oncoming traffic, period, unless a green arrow gives a protected turn.
- For school bus questions, look for the words divided highway or median. On an undivided road both directions stop; a physical median is typically what excuses oncoming traffic.
- If a question says you are driving the posted limit but conditions are bad, the correct answer invokes the basic speed law: the posted limit is a maximum for ideal conditions, not a guaranteed safe speed.
- Distances and exact figures, such as how far from a crossing you must stop or how long to signal, vary by state, so study the specific numbers in your own state's handbook rather than assuming a national value.