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.

Last updated: October 2026

"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

SituationRule
Private road, driveway or unpaved road onto a paved roadStop, then yield to pedestrians, bicyclists and vehicles on the road you are entering
Designated throughwayYield to traffic on the throughway before turning
Single or two-lane road meeting a divided highway or a road with three or more lanesYou 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 typeMovementLane
Single laneAnyEnter from the right lane of your road; exit onto the right lane of your new road
Multilane, no signsQuarter-turn (right) or straight aheadEnter from the right lane, stay in it, exit onto the right lane
Multilane, no signsThree-quarter turn or U-turnEnter 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.

FeatureRotaryRoundabout
SizeLargeMuch smaller
Design speedUp to 40 mph (big rotaries)25 mph or less
Entry controlYield signsYield lines, crosswalks
DirectionCounterclockwiseCounterclockwise
Who yieldsEntering traffic yields to traffic in the circle and to pedestriansSame

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.
Test Your Knowledge

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?

A

Go first, because vehicles from the right must yield to vehicles from the left

B

Yield only if the other vehicle is larger than yours

C

Yield to the vehicle that has entered from your right or is approaching from your right

D

Go first because you are on the wider road

Test Your Knowledge

A driver approaching a multilane rotary with no lane signs plans a three-quarter turn. Which lane plan does the Manual describe?

A

Enter from the left lane and exit directly from the inner lane into the left lane

B

Enter from the left lane, travel in the middle or inner lane and exit onto the right lane

C

Enter from the right lane and stay in the outer lane the whole way around

D

Enter from either lane and cut straight across to the exit

Test Your Knowledge

A driver waiting to turn left is waved on by another driver stopped in the oncoming lane. What does the Manual say?

A

Turn only if traffic and visibility show it is safe

B

Turn immediately, because the waving driver has given up the right-of-way for every lane

C

Never turn when waved in, even if every lane is clearly stopped

D

Turn only after flashing the headlights to thank the waving driver

Sections you finish are checked off in the contents.