Ever wonder when buses would use these short term designation signs and what time of the day? Here is an snapshot of the which shows what designations signs were used and when during the time of the day. This is for the Schedule of 2/2020 on a Weekday – the last full weekday schedule issued before the Covid-19 Pandemic.
http://www.philadelphiatransitvehicles.info/dest-march3rd2020.html