Amends GS 136-27.1(b), which sets out the percentage of the nonbetterment cost a municipality must pay for relocation of water and sewer lines owned by the municipality that must be relocated for a State transportation improvement project, with the prescribed percentages based on population. Provides that a municipality with a population of 25,000 or greater but less than 100,000 (was, 50,000) must pay 50% of the cost with the Department of Transportation paying the remainder, and a municipality with a population of 100,000 (was, 50,000) or greater must pay 100% of the cost.