Sentence:  A blow to this phase of the Central 's operations would have serious economic consequences not only to the <WSD>railroad</WSD> itself , but to the 40000 people per day who are provided with efficient , reasonably priced transportation in and out of the city . 
Meaning of the word marked with <WSD> tags:  line that is the commercial organization responsible for operating a system of transportation for trains that pull passengers or freight