“Ers ei lansio, mae’r cynllun wedi helpu i wella llif y traffig a lleihau nifer y damweiniau ar hyd y rhan hon o’r ffordd, gyda mwyafrif y gyrwyr yn cadw at y terfynau sydd wedi eu gosod.
“Since its launch the scheme has helped to improve traffic flow and reduce the number of collisions along this stretch, with the majority of drivers adhering to the limits in place.