Each vehicle counted in the delay study is assumed to be stopped for the duration of the selected interval (typically 15 seconds). Each column is added up in each of the subtotal blocks, and the total is recorded in the “Total” block. The total number of vehicles delayed is then multiplied by the interval (15 seconds) to get total vehicle-seconds of delay. Then the highest four consecutive 15 minute time periods are added together. This sum is then divided by 3600 to convert the value to vehicle-hours of delay. The result is then used to determine if the delay portion of Warrant 3, “Peak Hour,” is met.