RSA 228:4 State Transportation Projects.

I. Each state transportation project shall be built under contracts awarded to the lowest responsible bidder through competitive bidding. The following are excluded from this competitive bidding requirement:
(a) Normal highway and bridge maintenance and improvements. This includes state aided town road and bridge projects.
(b) Projects executed under RSA 481 with approval of the governor and council.
(c) Statewide transportation improvement program projects with a cost not to exceed $25,000,000 may be developed and constructed utilizing the design build concept based on a request for proposal. Such projects may be developed and constructed provided that selection is based on an objective standard and measurable criteria for evaluation of the proposals.
(d) St