If the Pamban Bridge is closed for trains, you can still reach Rameswaram from Ramanathapuram by road. Ramanathapuram is the nearest major town to Rameswaram, and there are several transportation options available for you to reach your destination. Here’s how you can reach Rameswaram from Ramanathapuram:

1. By Bus: Ramanathapuram is well-connected to Rameswaram by bus. You can find regular bus services operated by the Tamil Nadu State Transport Corporation (TNSTC) as well as private bus operators. Visit the Ramanathapuram bus station and inquire about the buses heading to Rameswaram. The journey usually takes around 1.5 to 2 hours.
2. By Taxi or Cab: Hiring a taxi or cab is a convenient option if you prefer a more personalized and flexible mode of transportation. You can find taxis available for hire in Ramanathapuram. Negotiate the fare with the driver or opt for pre-paid taxi services. The travel time from Ramanathapuram to Rameswaram by taxi is approximately 1 to 1.5 hours, depending on the traffic conditions.
3. By Private Vehicle: If you have your own vehicle or prefer to rent one, you can drive from Ramanathapuram to Rameswaram. The route is relatively straightforward, and you can use a GPS navigation system or follow signboards indicating the direction to Rameswaram. The distance between Ramanathapuram and Rameswaram is approximately 55 kilometers, and the journey takes around 1 to 1.5 hours, depending on the traffic.

It’s always a good idea to check for any updates or changes in transportation services before you travel. You can inquire at local tourist information centers, transportation authorities, or search online for the latest information on alternative routes and modes of transportation to Rameswaram from Ramanathapuram.