| Control Delay (s/veh) | LOS by Volume-to-Capacity Ratio | |
| ≤1.0 | >1.0 | |
| ≤10 | A | F |
| >10 - 20 | B | F |
| >20 - 35 | C | F |
| >35 - 55 | D | F |
| >55 - 80 | E | F |
| >80 | F | F |