Examples of use of overground
1. A Network Rail spokesman said overground trains had not been affected.
2. "We‘ve got every resource we can possibly find out here on the Underground and the overground system today.
3. Some train services, including all overground services, continued to operate yesterday, as did all bus services.
4. "It was always a bit of an underground thing and now it‘s gone overground.
5. Overground train operators have also sought to move staff from routine ticket–issuing towards working with passengers on platforms.