No essential services (water supply, sanitary sewer line, electric line, telephone or gas lines) shall be constructed beneath the paved surface of a public or private roadway, where a structure or parking area is located within 50 feet of the curb face of such roadway except that essential services may be constructed beneath the paved surface of a public or private roadway where they are perpendicular to the roadway. In that event, provisions shall be made for continued use of the roadway in those instances of restoration or repair of said essential services.