DELAYS ENCOUNTERED BY TOLL OPERATORS 



543 



5 2 



6 7 8 9 



SIZE OF GROUP 



10 11 12 13 14 15 



Fig. 1 — Average circuit delay on all calls (with alternate routes where authorized). 

 Circuit delay = average sjieed on all calls minus average speed on calls which did not 

 encounter NC. Based on 3-point moving average. 



