Yn ôl yr adroddiad, mae nifer y gwrthdrawiadau a achosodd farwolaethau neu anafiadau difrifol yn 2002-06 a 2007-11 wedi gostwng 11% yng Nghymru ac yn ôl yr arolwg, Cymru yw’r rhanbarth sydd wedi gwella leiaf.  Mae’r adroddiad hefyd yn cofnodi mai’r ffordd fwyaf peryglus yng Nghymru yw 38km o’r A44 rhwng Llangurig ac Aberystwyth.
The report records that the level of risk in Wales has reduced by 11% when comparing collisions which resulted in fatal and serious injuries in 2002-06 and 2007-11.  The 11% fall in risk puts Wales as the slowest improving region during the survey period.  The report also records that the highest risk road in Wales is 38km of the A44 from Llangurig to Aberystwyth.