New Hampshire HB1785 mandates mileage-based exit numbers on tier 1 highways, excluding Interstate 393.
New Hampshire HB1785 requires all tier 1 highways, excluding Interstate 393, to adopt exit numbers based on mileage from the Department of Transportation's linear referencing system. This change aligns with the United States Department of Transportation's requirements in the Manual on Uniform Traffic Control Devices. The Department of Transportation must complete the replacement of existing exit numbering by 2038. This act takes effect 60 days after its passage.
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