CI meaning in Regional ?

The Cambria and Indiana Railroad (C&I) (reporting mark CI) is a railway company that is located in the southeastern part of Indiana County, Pennsylvania in the United States. Incorporated in 1904 and built in 1910 with the intention of carrying lumber, coal was discovered in the area soon after its construction, and C&I's fortunes subsequently became closely intertwined with the coal industry.

C&I became the "richest railroad in the country", generating the most revenue per mile of track, during the 1930s and 1940s. The increasing use of electricity for heating purposes, however, dealt a severe blow to C&I and in 1995, C&I divested almost all its assets.