The most difficult intersection in town is on the verge of a major overhaul.

After five years of study and design, the plan for improving the safety at the corner of North and Chelmsford Roads is in the hands of annual town meeting on May 15.

The proposal is part of a bundle of transportation-related items embedded in the capital article, number 19. The total cost of section 22-26 is $3.82 million, most of which is for the intersection improvements.

Because of the magnitude of the expenditure, the article will be presented as a bond, which requires at least a two-thirds majority for approval.