It should be noted that the “up to one hour” time for ‘Short Duration’ work is not an absolute increment of time. The language of MUTCD (Section ) (1) appears to allow for a judgment as to whether the time necessary to set up and remove the traffic control zone is justified under the circumstances. It should also be noted that the next category ‘Short Term Stationary’ has a time period of greater than one hour and within one daylight period. There could certainly be situations in which work extends past one hour, perhaps three hours, but does not approach the entire daylight period. The procedures in the ‘Short Term Stationary’ category are applicable to work lasting an entire day and, therefore, may not be appropriate for a three hour job.