There is a similar problem when reinstating specialist surfaces where a whole carriageway would have to be reinstated when only a narrow trench has been used for telecoms deployment.
Mae problem debyg wrth adfer arwynebau arbenigol lle byddai’n rhaid adfer cerbytffordd gyfan pan mai dim ond ffos gul sydd wedi cael ei defnyddio ar gyfer cyflwyno telathrebu.