Bydd y ffordd osgoi newydd yn arwain at ostyngiad o 72% yn nifer y cerbydau sy’n teithio drwy’r Bontnewydd a gostyngiad o 33% drwy Gaernarfon. Canlyniad hyn fydd llai o hollti cymunedau a chyfleusterau, a gwell diogelwch, ansawdd aer ac ansawdd bywyd yn yr aneddiadau ar hyd y ffordd hon. Bydd cael gwared ar draffig trwodd yn gyfle hefyd i annog teithio llesol o fewn ac o gwmpas Caernarfon a’r Bontnewydd drwy eu cysylltu â’r cymunedau cyfagos.
The new bypass will reduce traffic volumes through Bontnewydd by 72% and through Caernarfon by 33%. This will lead to reduced severance of communities and facilities, improved safety, air quality and quality of life in the settlements along this route. The removal of through traffic will also provide opportunities to encourage active travel within and around Caernarfon and Bontnewydd by linking with the surrounding communities.