New Hampshire's primary keep-right and left-lane rules are found in RSA 265:16.
A vehicle traveling at less than the normal speed of traffic under the conditions then existing generally must be driven in the right-hand lane available for traffic, or as close as practicable to the right-hand curb or edge of the roadway.
This slower-traffic rule does not apply when the driver is overtaking and passing another vehicle traveling in the same direction or when preparing for a left turn at an intersection or into a private road or driveway.
New Hampshire also has a specific rule aimed at left-lane blocking. A motor vehicle may not be operated continuously in the left lane of a multilane roadway when doing so impedes the flow of other traffic traveling at or below the posted speed limit.
The left-lane rule allows continued use of the lane when doing so is reasonable and prudent under the existing conditions, taking into account actual or potential hazards.
New Hampshire therefore combines a traditional slower-traffic keep-right rule with a separate restriction against unnecessarily impeding traffic from the left lane.
Exceptions
- Overtaking and passing another vehicle traveling in the same direction.
- Preparing for a lawful left turn at an intersection or into a private road or driveway.
- Avoiding an obstruction when moving left is necessary and safe.
- Traveling on certain three-lane roadways under applicable lane rules.
- Traveling on a properly designated one-way roadway.
- Conditions or hazards that make continued use of the left lane reasonable and prudent.
Penalties
A violation of RSA 265:16 is a violation-level offense. The statute provides a $50 fine plus the applicable penalty assessment.
New Hampshire's current plea-by-mail schedule lists failure to drive on the right side of the roadway under RSA 265:16(I-III) at $62.
Drivers should verify the amount shown on their citation because the total payable amount may include statutory assessments.
Official Source
New Hampshire RSA 265:16 - Drive on Right Side of Roadway; Exceptions
Last verified: October 11, 2026