I think it's right to have, especially around schools for safety reasons, but during the hours of ten pm to seven in the morning, I think it's a bit excessive to have it at 20mph.
Rydw i’n meddwl ei bod hi’n iawn bod rhai rhannau felly, yn enwedig o amgylch ysgolion am resymau diogelwch, ond rhwng deg y nos a saith y bore, rydw i’n meddwl ei bod yn eithafol iddo fod yn 20mya.