Travel options IND to Sheraton Hotel, Keystone @ the Crossing, Indianapolis
 

A support staffer going to a conference in October (who is NOT a frequent or savvy traveler) needs to get from IND to the Sheraton Hotel at Keystone at the Crossing. She reports to me that the only ground transporation she's found is a limo/shuttle service that is quoting $60 one-way.

What's the likely cost of a taxi and are there other options? TIA!