These plates are used on buses which transport passengers for hire. They can be used on vans to motorcoaches.
This type started in 1922 as "Jitney". They had the reverse colors of passenger plates with a J- prefix. Sometime in the 1930s the type was changed to "Bus" which is used to today.
"Temporary Jitney" plates are known for the 1920s, with a TJ- prefix.
"General District" Bus plates were used starting sometime in the 1950s. These look the same as regular bus plates (including the "Bus" caption), but have a letter prefix. They were issued to transportation agencies as a series - for example, A 15, B 15, C 15, etc. I am not sure when new plates of this type were discontinued, but a couple of existing registrations were carried over into the 2000s.
Click the photo to see this type in use.
1957
This plate was used in '56 and '57.
The shiny background didn't scan too well.
