Gwynedd Council suggested that the cost of such a scheme would be significant, and so it should be thought of as a last resort once other solutions have been tried.
Awgrymodd Cyngor Gwynedd y byddai cost cynllun o'r fath yn sylweddol, ac felly y dylai gael ei ystyried fel dewis olaf unwaith y rhoddir cynnig ar yr atebion eraill.