Mae LLYW.CYMRU yn defnyddio cwcis sy'n hanfodol i'r safle weithio. Defnyddir cwcis nad ydynt yn hanfodol hefyd i deilwra a gwella gwasanaethau. Trwy barhau i ddefnyddio'r safle, rydych yn cytuno ein bod ni'n defnyddio cwcis.
Diffiniad: These are ‘B’ and ‘C’ classified roads and unclassified roads (all of which are maintained by the local authorities), as referred to above. Class III (later ‘C’) roads were created in April 1946. Previously these roads were ‘unclassified’. 'B' Roads in urban areas can have relatively high traffic flows, but are not regarded as being as significant as 'A' roads. They are useful distributor roads often between towns or villages. 'B' Roads in rural areas often have markedly low traffic flows compared with their 'A' road counterparts. 'C' Roads are regarded as of lesser importance than either 'B' or 'A' roads, and generally have only one carriageway of two lanes and carry less traffic.
