The most relevant BCRs (given that Welsh Government policy is aiming to reduce traffic volumes) are those for the Low Traffic Growth Scenario.
Y cymarebau cost:budd mwyaf perthnasol (o ystyried mai polisi Llywodraeth Cymru yw ceisio lleihau lefelau traffig) yw'r rhai ar gyfer y Senario Twf Traffig Isel.