Ind. Code § 9-21-3-9
When lane use control signals are placed over individual lanes, the signals apply to vehicular traffic as follows:
(4) Flashing yellow indication (yellow X symbol) means vehicular traffic may use the lane only for the purpose of approaching and making a left turn.
[Pre-1991 Recodification Citation: 9-4-1-37.1.]
As added by P.L.2-1991, SEC.9.