<Tr> <Td> 18 </Td> <Td> Keystone Service </Td> <Td> Philadelphia </Td> <Td> 1,508,200 </Td> <Td> 5,000 </Td> <Td> 104.6 </Td> <Td> 48 </Td> <Td> 1976 (?) </Td> <Td> </Td> <Td> 12 </Td> </Tr> <Tr> <Td> 19 </Td> <Td> NCTD Coaster </Td> <Td> San Diego / Oceanside </Td> <Td> 1,425,900 </Td> <Td> 4,500 </Td> <Td> 41 </Td> <Td> 110 </Td> <Td> 1995 </Td> <Td> </Td> <Td> 8 </Td> </Tr> <Tr> <Td> 20 </Td> <Td> Altamont Corridor Express (ACE) </Td> <Td> San Jose / Stockton </Td> <Td> 1,322,200 </Td> <Td> 5,300 </Td> <Td> 86 </Td> <Td> 62 </Td> <Td> 1998 </Td> <Td> </Td> <Td> 10 </Td> </Tr> <Tr> <Td> 21 </Td> <Td> SunRail </Td> <Td> Orlando </Td> <Td> 851,800 </Td> <Td> 2,334 </Td> <Td> 32 </Td> <Td> 73 </Td> <Td> 2014 </Td> <Td> </Td> <Td> 12 </Td> </Tr>

List of commuter rail systems in the united states