Is it ok for a baby, 1 month old, to travel in the air conditioned coach of a train?

Yes. Traveling with babies requries some advanced planning. Keep your baby comfortable and bring plenty of supplies (clothes, diapers, etc) as you may experience delays while traveling. Infants under 8 weeks of age are particualry susceptible to infections, so limit exposure to people who could accidentlally spread illness. If your baby becomes ill or has a fever while traveling call your doctor asap.