what is 3e in train

3E is a travel class in Indian Railways, which stands for 3rd AC Economy. It is available in Duronto trains and Garib Rath Express, and was introduced as an initiative to enable poor people to travel by AC coaches. The 3E class has 6 berths and 3 side-berths, totaling to 9 berths, and is similar to the SA seats. The train may be a little crowded during the day due to the extra side-berth. The total number of berths in a 3E coach ranges from 72 to 81, and bedroll charges are extra.