NC S639

Replaces variable motor fuel excise tax with flat rates: 19 cents per gallon on diesel fuel and 9 cents per gallon on all other motor fuels, effective January 1, 2018.

Establishes new annual infrastructure access fee on vehicle registrations based on vehicle weight, ranging from $100 to $200, with 25% of revenue credited to Highway Trust Fund and 75% to Highway Fund, effective January 1, 2017.

Imposes road usage tax on motor carriers based on frequency of highway use, calculated by multiplying in-state mileage by weight-group-based tax rates ranging from 49.8 to 181.1 mills per mile, effective January 1, 2017.

Eliminates statutory transfers of motor fuel excise tax proceeds to environmental cleanup funds, wildlife resources, and water/air quality programs; requires General Assembly to appropriate alternative Highway Fund revenue for these purposes starting fiscal year 2017-2018.

Prohibits construction of new toll projects or increases to existing tolls after August 1, 2015, unless approved by majority voter referendum in each affected county; exempts tolls established prior to August 1, 2015, and obligations from pre-existing bonds.