4.2 Intersections, Right Turn on Red & Highway Driving
Key Takeaways
- At uncontrolled intersections or 4-way stops where two vehicles arrive simultaneously, N.J.S.A. 39:4-90 mandates that the driver on the left must yield the right-of-way to the driver on the right.
- New Jersey publishes no set right-of-way rule for its traffic circles: the circle's established traffic-flow pattern and any posted stop or yield signs govern, and when in doubt the vehicle on the left yields to the vehicle on the right.
- New Jersey law (N.J.S.A. 39:4-115) permits a right turn on red after coming to a complete stop, checking for 'No Turn on Red' signs, and yielding right-of-way to all pedestrians and oncoming traffic.
- Acceleration lanes at highway entrances allow drivers to match the speed of highway traffic before merging, while deceleration lanes at exits require drivers to maintain highway speed until fully exiting before braking.
- In a highway weave lane shared by entering and exiting traffic, the driver entering from the entrance ramp must yield the right-of-way to the driver leaving the expressway.
4.2 Intersections, Right Turn on Red & Highway Driving
Quick Answer: Navigating intersections and highways safely requires strict adherence to right-of-way rules. At uncontrolled intersections and 4-way stops, the driver on the left yields to the driver on the right. New Jersey has no set rule for its traffic circles — the established flow pattern and posted signs decide, and in doubt the vehicle on the left yields to the vehicle on the right. New Jersey permits a right turn on red after making a complete stop and yielding to oncoming traffic and pedestrians, unless a "No Turn on Red" sign is posted. On highways, acceleration lanes allow entering vehicles to match traffic speed, deceleration lanes permit safe slowing off the main road, and in a shared weave lane the entering driver yields to the exiting driver.
Types of Intersections & Right-of-Way Rules
An intersection is any location where two or more roadways cross or connect. Intersections represent high-risk points on public roads, accounting for nearly half of all reported traffic crashes in New Jersey.
Controlled Intersections
A controlled intersection features active traffic signals, regulatory signs (Stop or Yield signs), or a traffic police officer directing movement.
- Traffic Signals: Drivers must obey red, yellow, and green lights.
- Stop Signs: Drivers must bring the vehicle to a complete stop behind the stop line, crosswalk, or sidewalk line.
- Yield Signs: Drivers must slow down and yield right-of-way to cross-traffic before proceeding.
Uncontrolled Intersections
An uncontrolled intersection has no traffic signals, regulatory signs, or police control. Uncontrolled intersections are common in residential neighborhoods and rural areas.
- Basic Rule: As a driver approaches an uncontrolled intersection, they must reduce speed and prepare to stop.
- The Right-Hand Rule: If two vehicles arrive at an uncontrolled intersection or a 4-way stop at the same time, the driver on the left MUST YIELD the right-of-way to the driver on the right.
| Intersection Scenario | Right-of-Way Priority Rule |
|---|---|
| Two cars arrive at 4-way stop simultaneously | Driver on the left yields to the driver on the right |
| Vehicle turning left vs oncoming straight traffic | Left-turning driver yields to oncoming straight vehicles |
| Private driveway entering public road | Vehicle on driveway yields to all vehicles on public road |
| Uncontrolled T-intersection | Vehicle on terminating road yields to traffic on continuing road |
Traffic Circles & Roundabouts
Traffic circles (rotaries) and modern roundabouts manage intersection flow without traditional traffic lights.
- The New Jersey rule is that there is no rule. The Driver Manual states plainly that there are no set rules for driving into, around, and out of a traffic circle in New Jersey. Common sense and caution govern.
- What actually decides right-of-way: the circle's historically established traffic-flow pattern. Where a major highway flows into and through the circle, that highway usually dominates and commands the right-of-way. Posted stop or yield signs at the circle entrances override everything else.
- When in doubt: fall back on the basic uncontrolled-intersection rule — the vehicle on the left yields to the vehicle approaching from the right.
- Modern roundabouts are different from New Jersey's legacy circles: they are one-way circular intersections built so that all entries and exits are right turns, which removes the left-turn conflicts that cause severe crashes at conventional intersections. Entering traffic at a modern roundabout is controlled by yield signs.
- Never enter any circle without first checking every sign and reading the intentions of the drivers already moving inside it.
Right Turn on Red Law (N.J.S.A. 39:4-115)
New Jersey law allows motorists to make a right turn at a steady red traffic signal under strict conditions:
- Complete Stop Required: The driver MUST bring the vehicle to a full and complete stop before the stop line or crosswalk.
- Check for Restrictions: Verify that no sign reading "No Turn on Red" is posted at the intersection.
- Yield to Traffic & Pedestrians: Yield the right-of-way to all oncoming vehicles, cyclists, and pedestrians crossing the street.
- Execute Safely: Proceed with the right turn only when the roadway is completely clear.
Exam Trap: Rolling through a red light to make a right turn without stopping completely is illegal — it is charged as failure to observe a traffic signal under N.J.S.A. 39:4-81, worth 2 penalty points. Always signal at least 100 feet before the turn (N.J.S.A. 39:4-126) and cancel the signal afterward.
Highway Driving: Acceleration & Deceleration Lanes
Highways and expressways involve high-speed, multi-lane driving. Entering and exiting these high-speed corridors requires specialized lane utilization.
Acceleration Lanes
An acceleration lane is an extra lane at a highway entrance that allows drivers to increase speed to match the flow of highway traffic before merging.
- Merging Strategy: Accelerate to match highway speed in the acceleration lane. Signal left, monitor rearview/side mirrors, check the left blind spot, and yield to highway vehicles before merging smoothly into an open gap.
- Avoid Stopping: Never stop in an acceleration lane unless traffic flow is completely blocked or safety dictates an emergency stop.
Deceleration Lanes
A deceleration lane is an extra lane at a highway exit that allows motorists to slow down safely without disrupting traffic on the main highway.
- Exiting Strategy: Maintain highway speed on the main roadway until moving entirely into the deceleration lane. Once in the deceleration lane, apply brakes smoothly to reduce speed to the posted ramp limit.
- Missed Exits: If you miss your intended highway exit, never back up or reverse on the highway or exit ramp. Continue to the next available exit and turn around safely.
Blind Curves & Steering Physics
When a vehicle negotiates a curve, physical forces (inertia and momentum) cause the vehicle to want to keep traveling in a straight line.
- Entering a Curve: Drivers must slow down BEFORE entering the curve to maintain control.
- Handling the Curve: Keep to the right of the center line, steer smoothly through the curve, and accelerate gradually only after reaching the apex of the curve.
- Braking Hazard: Braking hard while turning in a curve can cause the tires to lose traction, resulting in a skid or loss of vehicle control.
Weaving Lanes (Shared Entrance & Exit Lanes)
A weaving lane occurs on expressways where an entrance ramp and an exit ramp share the same physical lane over a short distance. This configuration creates simultaneous traffic conflict between vehicles attempting to enter the highway and vehicles attempting to exit.
- Conflict Rule: The driver ENTERING from the entrance ramp must YIELD the right-of-way to the driver LEAVING the expressway. This is the exact wording of the New Jersey Driver Manual, and it is the single most-missed weave-lane question on the exam.
- Rationale: The exiting driver is already established in the traffic stream and is committed to a fixed exit point; the entering driver still has the option to slow, extend the merge, or abort. The conflict is resolved in favor of the vehicle with fewer options.
- Practical technique: entering a weave lane, look ahead and left for the exiting vehicle first, then adjust speed and space rather than forcing the merge. Exiting through a weave lane, hold your speed and lane position and exit decisively.
When two vehicles arrive at an uncontrolled 4-way intersection at the exact same time, which driver must yield the right-of-way?
Prior to making a right turn on red at an intersection in New Jersey, what action must a motorist take?
In a highway weave lane where an entrance ramp and an exit ramp share the same lane, which driver must yield?
When a motor vehicle enters a sharp or blind curve, what physical tendency affects the vehicle's movement?
What is the proper function of a highway acceleration lane when entering an expressway?