11.3 Right-of-Way Rules, Rotaries, Roundabouts & Courtesy Crashes
Key Takeaways
At a Massachusetts intersection with no signs or signals, drivers must yield to any vehicle that has entered from the right or is approaching from the right.
At a Massachusetts four-way stop, vehicles go in the order they stopped; for vehicles stopping together, the driver on the left yields to the driver on the right.
A Massachusetts driver entering a paved road from a private road, driveway or unpaved road must stop and yield to pedestrians, bicyclists and vehicles.
Massachusetts rotary traffic moves counterclockwise, and entering drivers yield to vehicles already in the rotary and to pedestrians.
Big Massachusetts rotaries are designed for speeds up to 40 mph, while roundabouts require 25 mph or less.
"Right-of-way rules" settle situations that signs and signals don't control. The Manual is emphatic: they do not give you any "rights." The right-of-way is something you give, not take. If another driver doesn't follow the rules, give the right-of-way anyway.
Pedestrians
Always yield to pedestrians in the roadway. Also:
- when your light turns green, yield to pedestrians already in the crosswalk;
- when turning, watch for pedestrians, who have the right-of-way on a sidewalk or crossing a driveway or alley;
- always yield to blind pedestrians and stay stopped until they have crossed. Don't honk or wave them on, and never pass a stopped vehicle. The White Cane Law requires a complete stop;
- on multilane roads, never pass a vehicle stopped at a crosswalk without checking for pedestrians.
Intersections Without Signs or Signals
Slow down, look left and right, and go if the way is clear. However:
- Yield to any vehicle that has entered the intersection from your right, or is approaching from your right.
- Watch for traffic from the left as well. Even with the legal right-of-way, make sure the other driver is yielding.
Four-Way Stops
At an all-way stop, yield to:
- any vehicle that has already stopped;
- a vehicle directly to your right that stopped at the same time as you.
Vehicles go in the order they stopped: the first to stop is the next to go. If in doubt, yield to the driver on your right. Eye contact helps judge intentions.
Left Turns
Before any left turn, yield to:
- oncoming vehicles;
- vehicles already in the intersection;
- pedestrians or bicyclists crossing your path.
Entering From Lesser Roads
| Situation | Rule |
|---|---|
| Private road, driveway or unpaved road onto a paved road | Stop, then yield to pedestrians, bicyclists and vehicles on the road you are entering |
| Designated throughway | Yield to traffic on the throughway before turning |
| Single or two-lane road meeting a divided highway or a road with three or more lanes | You must yield |
Rotaries
Rotaries are much more common in Massachusetts than elsewhere. A rotary lets roads from several directions meet without STOP signs or signals. There are yield signs at the entrances, and a central island forces traffic around it. Big rotaries are designed for speeds up to 40 mph.
Rotary traffic rules
- Traffic moves counterclockwise.
- Yield to vehicles already in the rotary, unless signs or police direct otherwise, and to pedestrians.
- Signal as at any other intersection, and use your right turn signal when you are ready to exit.
Choosing a lane
| Rotary type | Movement | Lane |
|---|---|---|
| Single lane | Any | Enter from the right lane of your road; exit onto the right lane of your new road |
| Multilane, no signs | Quarter-turn (right) or straight ahead | Enter from the right lane, stay in it, exit onto the right lane |
| Multilane, no signs | Three-quarter turn or U-turn | Enter from the left lane, travel in the middle or inner lane, exit onto the right lane. If your approach road has one lane, stay in the right lane for the whole turn |
In a multilane rotary there may be traffic on both sides of you. Don't leave your lane until it is safe. If you miss your exit, stay calm and go around again. Don't stop in the rotary. Collisions while merging into a rotary are a Standard of Fault (section 7.2).
Roundabouts
Roundabouts are much smaller than rotaries, with a smaller central island. Most have yield lines and crosswalks. Their size requires speeds of 25 mph or less, which also reduces lane changes and makes them safe for bicyclists. Look for lane signs on the approach and follow the rotary rules for choosing a lane.
| Feature | Rotary | Roundabout |
|---|---|---|
| Size | Large | Much smaller |
| Design speed | Up to 40 mph (big rotaries) | 25 mph or less |
| Entry control | Yield signs | Yield lines, crosswalks |
| Direction | Counterclockwise | Counterclockwise |
| Who yields | Entering traffic yields to traffic in the circle and to pedestrians | Same |
Courtesy Crashes
Drivers trying to be nice can cause confusion and "courtesy crashes." Waving someone through stopped traffic, or driving through because someone waved you in, is dangerous. Base your turn on traffic and visibility: turn only if you can see there is no oncoming traffic, or that all of it has stopped. Oncoming traffic keeps the right-of-way, whoever is waving at you.
Coaching Yield Decisions and Rotaries
- Narrate yield decisions. At every uncontrolled intersection ask: "Who is on our right? Have they entered or are they approaching?"
- Rehearse rotary lanes before arriving. Name the exit, then the entry lane and the exit lane, before reaching the yield sign.
- Never wave pedestrians or drivers through. Model the Manual's rule that a hand wave never transfers the right-of-way.
At an intersection with no signs or signals, two vehicles arrive at about the same time, one from your right. What does the Manual require?
Go first, because vehicles from the right must yield to vehicles from the left
Yield only if the other vehicle is larger than yours
Yield to the vehicle that has entered from your right or is approaching from your right
Go first because you are on the wider road
A driver approaching a multilane rotary with no lane signs plans a three-quarter turn. Which lane plan does the Manual describe?
Enter from the left lane and exit directly from the inner lane into the left lane
Enter from the left lane, travel in the middle or inner lane and exit onto the right lane
Enter from the right lane and stay in the outer lane the whole way around
Enter from either lane and cut straight across to the exit
A driver waiting to turn left is waved on by another driver stopped in the oncoming lane. What does the Manual say?
Turn only if traffic and visibility show it is safe
Turn immediately, because the waving driver has given up the right-of-way for every lane
Never turn when waved in, even if every lane is clearly stopped
Turn only after flashing the headlights to thank the waving driver
Sections you finish are checked off in the contents.