The commissioner of transportation, whenever in his opinion the public good so requires, may designate for improvement, subject to the approval of the governor and council, any class I, II, or III highway or portion thereof.
RSA 235:10
1945, 188:1, part 12:1. 1950, 5:1, part 9:1, par. 2. RSA 240:1. 1981, 87:1. 1985, 402:6, I(b)(6). 1988, 245:3, eff. June 29, 1988.