For about 2 hours during the morning commute, the signal for the westbound I-285 off ramp and northbound Ashford Dunwoody have a concurrent green signal for 10 seconds during each cycle of the light. This overlap is necessary during this heavy traffic period to prevent the off ramp traffic from backing up onto the interstate and causing a safety issue with higher speed traffic. At all other times of day, the ramp and Ashford Dunwoody have exclusive greens. The attached image provides an alternative route to Hammond Drive should you find it difficult to access it at Ashford Dunwoody Rd.