What technology provides digital radio broadcasts along with additional services such as traffic updates?

Digital Audio Broadcasting (DAB) is the correct choice because it is specifically designed to deliver digital radio broadcasts with enhanced audio quality and reliability. One of the significant advantages of DAB is its ability to transmit additional services alongside the standard audio content, which includes things like traffic updates, weather information, and program guides. This capability stems from DAB's use of digital transmission technology, allowing for the efficient allocation of data and enabling broadcasters to offer both audio and supplementary information simultaneously.

In contrast, satellite radio primarily relies on satellite signals and typically offers a wider variety of programming but does not inherently include the same level of local services like immediate traffic updates. Traditional AM and FM radio broadcasts are analog and do not support the transmission of extra data services in the same way that DAB does, thus limiting their capability to provide additional, real-time information alongside audio broadcasts.