Dear Sir,
I like riding on train too.
I've heard about new route of Bangkok to Pattaya
You can visit Pattaya in one day : Depart Bangkok 06:45-09:50 // Return 15:50-18:55
You can check on website below.
http://www.railway.co.th/main/train/banputaluangT997.htmlWell, you manage train timetable from Korat-Bangkok on website below.
http://www.railway.co.th/WebDestination/#/SearchDestination/ENon pic#2:
Train#78 : class2 (Air) = 325B/seat , class3 = 200B/seat
Train#142 : class2 = 165B/seat , class3 = 100B/seat
Train#24 : class1 = 1030-1230B/bed , class2 = 715-815B/bed >> [Getting new experience on sleeper train from Korat-Bangkok]
*Cost different by Special express/express/rapid : Air/Fan/window

*For good and clear information, please ask officer at any train station
*Booking tickets of any route at any train station : it's online system with English speaking officer

** This is Train Tracking System [delay 0-103 minutes

]
http://tts.railway.co.th/passenger/view.phpHave a fun trip.
WH