Methods whereby highways may become maintainable at public expense Methods whereby highways may become maintainable at public expense England and Wales 37Provisions whereby highway created by dedication may become maintainable at public expense. 38Power of highway authorities to adopt by agreement. 39. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40Adoption of private streets. Methods whereby highways may become maintainable at public expense