Original sentence: It is headquartered at Jaipur and comprises  Jodhpur division and reorganized Bikaner division of Northern Railway, and reorganized Jaipur and Ajmer divisions of Western Railway
Edited sentence: It comprises four divisions: Jodhpur and reorganized Bikaner division of the erstwhile Northern Railway and reorganized Jaipur and Ajmer divisions of the erstwhile Western Railway.It is headquartered at Jaipur.North Western Railway website.This railway comprises a total of 578 stations covering a total of 5449.29 route kms out of which 2575.03 are broad guage and 2874.23 are metre guage.This zone came into existence on October 1, 2002