Exit 113 is listed as a exit for Shelly but it is really South Idaho Falls. It will get you about 5 miles north of Shelley but on the road you need to be. Exit 108 is just west of Shelley and is the best exit to take. It will also put you on the road you need to be. If you found Shelley spelled as Shelly then it is just a typo. Diarmuid