Complex sentence: In general these are much smaller than the Service Areas available every 30 km or so on the inter-city expressways, in some cases no more than toilets, a few vending machines and a handful of parking spaces.
Split into simpler sentences: In general these are much smaller than the service areas available every 30 km or so on inter-city expressways. In some cases they are no more than toilets, a few vending machines, and a handful of parking spaces.