Editing Radio Data System (section)

==== Traffic Program ====
This can be considered an additional program type bit, and indicates that the station broadcasts periodic [[traffic report]]s. By including it in every group, a receiver can quickly search for a station which includes traffic reports.

Another bit, traffic announcement (TA), is sent in block types 0A, 0B and 15B to indicate that such a report is in progress. It is common for otherwise-[[simulcast]] transmitters to have periodic local traffic reports which are customized to the individual transmitter. The traffic announcement bit tells a receiver that a transmitter-specific broadcast is in progress, and it should avoid switching frequencies while they are in progress.

(There is a different form of traffic announcement bit in block type 14B, which indicates the presence of a traffic announcement on a ''different'' frequency, so that radio receivers can automatically switch.)