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New Hampshire Frost Laws, Seasonal Load Weight and Speed Restrictions – 2026

Current Monitoring Status

Status

Active

Last Checked

9 minutes ago

Last Updated

Not available

RESTRICTION STATUS: ACTIVE
Spring thaw restrictions are currently in force on posted NHDOT-maintained state highway and state-maintained secondary road segments across Districts 14 in New Hampshire. Coverage spans Coos, Grafton, Carroll, Belknap, Merrimack, Sullivan, Cheshire, and Hillsborough counties. Local and town-maintained roads are not covered by this program. Check the live segment list before every dispatch at nhdotpermits.org/SpringThawRestrictionsViewer.aspx.

"HURRICANE MT RD - BARTLETT - JCT w/US-302 & NH-16 to CONWAY T/L (GATED)" a representative active entry from the NHDOT Spring Thaw Restrictions Viewer, confirming restrictions are in force on listed segments across Districts 14 as of 2026-04-01 at 20:03 UTC.

Field Detail
Status ACTIVE All rows in the NHDOT Spring Thaw Restrictions Viewer show the Active checkbox checked. Restrictions are in force on all listed segments across Districts 14. Confirmed at nhdotpermits.org/SpringThawRestrictionsViewer.aspx.
Status Timestamp 2026-04-01 at 20:03 UTC
Coverage NHDOT-maintained state highways and state-maintained secondary roads only, across Districts 14. Counties covered: Coos, Grafton, Carroll, Belknap, Merrimack, Sullivan, Cheshire, and Hillsborough. Local and town-maintained roads are not covered restrictions end at NHDOT maintenance boundaries.
Effective Dates Not specified no start or end date is published on the viewer. Restrictions are confirmed active as of the status timestamp. Monitor the live viewer before every dispatch.
Weight Limits Not specified specific posted weight limits are not published in the live viewer table. Consult NHDOT District Engineers or the NHDOT permit program for applicable limits before operating on posted segments.
Key Roads State numbered routes including NH-16, NH-16A, NH-16B, NH-25B, NH-26, NH-31, NH-63, NH-78, NH-103B, NH-110A, NH-110B, NH-112, NH-113, NH-116, NH-118, NH-123, NH-127, NH-132, NH-135, NH-142, NH-145, NH-153; US routes including US-2, US-3, US-302; state-maintained secondary roads including Bear Notch Rd, West Side Rd, Dolly Copp Rd, Cathedral Ledge Rd, West Shore Rd, Stinson Lake Rd, Winona Rd, River Rd, and others. Full segment list: nhdotpermits.org/SpringThawRestrictionsViewer.aspx.
Exemptions Not specified on the viewer page.
Penalties Not specified.
Contact NH Department of Transportation (NHDOT) Spring Thaw Restrictions Viewer: nhdotpermits.org/SpringThawRestrictionsViewer.aspx
Primary Status Source URL https://nhdotpermits.org/SpringThawRestrictionsViewer.aspx

Active Restriction Scope

The NHDOT Spring Thaw Restrictions Viewer confirms restrictions are currently in force across all four NHDOT districts. Every row in the live table has its Active checkbox checked. The restriction network spans the following counties:

  • Coos County
  • Grafton County
  • Carroll County
  • Belknap County
  • Merrimack County
  • Sullivan County
  • Cheshire County
  • Hillsborough County

The full current segment list is only available on the live viewer page. Check the viewer before every dispatch.

Road Types Subject to Restrictions

Classification Examples
State Numbered Routes NH-16, NH-16A, NH-16B, NH-25B, NH-26, NH-31, NH-63, NH-78, NH-103B, NH-110A, NH-110B, NH-112, NH-113, NH-116, NH-118, NH-123, NH-127, NH-132, NH-135, NH-142, NH-145, NH-153; US-2, US-3, US-302
State-Maintained Secondary Roads Bear Notch Rd, West Side Rd, Dolly Copp Rd, Cathedral Ledge Rd, West Shore Rd, Stinson Lake Rd, Winona Rd, River Rd, and others within NHDOT maintenance limits

Restrictions end at NHDOT maintenance boundaries. Segments beyond those boundaries including town-maintained portions of the same road are not covered by this program.

Special Conditions and Boundary Notes

  • Gated corridor: Hurricane Mountain Road (Bartlett) from the junction with US-302 and NH-16 to the Conway town line is listed as GATED on the viewer. Confirm physical access before routing through this segment regardless of restriction status.
  • Defined segment example NH-116: The viewer lists NH RT 116 from County Road in Haverhill to Rte. 112 in Easton (7.96 miles), illustrating that restrictions apply to defined segment endpoints, not entire route lengths.
  • Parallel town restriction North Groton Road: NHDOT posts North Groton Road (Groton) only within its maintenance limits. The viewer notes: "The Town of Groton posts North Groton Road from Halls Brook Road west to the Groton/Dorchester town line" that western segment is a separate town-level restriction outside NHDOT scope.
  • Historical note River Road: The River Rd entry (Jct w/US-302 & NH-16 to West Side Rd) includes a notation referencing Spring of 2014, indicating a long-standing restriction on this corridor.
  • Maintenance boundary endpoints: Multiple segment entries explicitly define restriction endpoints as the limit of NHDOT maintenance or a town boundary. Restrictions do not extend beyond these points.
  • Districts 14 all active: The viewer shows active restrictions spanning all four NHDOT districts simultaneously.

Operational Notes for Dispatch

  • Restrictions are confirmed active. All listed segments on the viewer show active status as of 2026-04-01 at 20:03 UTC. Do not operate on listed segments above posted limits.
  • State highways and state-maintained secondary roads only. Local and town-maintained roads are not covered by this program. Do not assume a road is unrestricted solely because it does not appear on the NHDOT list check with the municipality if town roads are on your route.
  • No weight limits published on the viewer. Specific posted weight limits are not displayed in the live table. Consult NHDOT District Engineers or the NHDOT permit program for applicable limits before operating on posted roads.
  • No effective dates published. No start or projected lift date appears on the viewer. Monitor the live page continuously throughout spring thaw season.
  • No exemptions or penalties published on the viewer. These details are not available from this source. Contact NHDOT directly for exemption eligibility and enforcement guidance.
  • Gated road alert. Hurricane Mountain Road (Bartlett) is marked GATED on the viewer. Verify physical access before dispatch regardless of restriction status.
  • Segment endpoints matter. Restrictions apply only between the defined endpoints listed on the viewer. Confirm segment boundaries before routing through partially restricted corridors.

Source Attribution

Restriction status, district and county coverage scope, road segment classifications, and special condition notes were retrieved from the NHDOT Spring Thaw Restrictions Viewer on 2026-04-01 at 20:03 UTC. The viewer page does not publish weight limits, effective start or end dates, exemption details, or penalty information. The full live segment list is only available at the viewer. The source page does not display a last-updated timestamp; the status timestamp reflects the time of retrieval.

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