MARC
The present MARC system evolved slowly as Maryland first subsidized passenger service provided by the Baltimore & Ohio Railroad on the Camden and Brunswick lines. A short "official" history can be found on the MTA web site. Trains Magazine has a story on MARC that includes a detailed history. Another version can be found on Wikipedia.Ridership has grown rapidly recently. A short summary of daily trips is shown below.
| Fiscal Year | Penn | Camden | Brunswick | System |
| FY 96 | 10 491 | 3 185 | 4 865 | 18 595 |
| FY 00 | 12 869 | 3 080 | 4 910 | 20 859 |
| FY 04 | 16 297 | 3 920 | 6 269 | 26 486 |
| FY 05 | 16 448 | 4 079 | 6 576 | 27 103 |