Simplify the following text for a Grade 7 native English-speaking person.
Original: Tram rails can be placed in several surfaces , such as with standard rails on sleepers like railway tracks , or with grooved rails on concrete sleepers into street surfaces ( pavement ) for street running .
Simplified: Tram rails can be placed in several surfaces . Standard rails can be put on sleepers like railway tracks , or with grooved rails on concrete sleepers into street surfaces ( pavement ) for street running .