I say sort-of because whether it counts as 'rural detail' is debatable - but I've created some motorway services. These seem to be overlooked in a lot of the OGF world but are essential to any highway network.
Poiylka Services http://opengeofiction.net/#map=17/52.73744/110.02317
The access is slightly unusual as the facilities serve both sides of the A20 and also act as a junction for the nearest village. Land could not be acquired on the opposite side, and traffic is light enough not to require doubling of facilities. The service area is one of the smaller ones on the Karolian motorway network
The services have a sit-down buffet restaurant, a fast-food outlet, a cafe and a general store. Toilets, drinking water and showers are available (the first two are legal requirements in Karolia) as well as WiFi, an interactive traffic information point and an old-fashioned phone, There are 10 spaces for electric vehicles with charging points as well as a fuel station for all vehicles. The lawn at the rear of the building has a children's playground and a picnic area as well as information about the landscape and wildlife of the region. A motel with meeting rooms has recently been built on the site. KAP, the Karolian breakdown service, have a tow truck based here too.
If you've built any, show us your motorway or highway services.