Ind. Code § 9-21-8-24
(a) A person may not:
(3) change from one (1) traffic lane to another;
unless the movement can be made with reasonable safety.
(b) Before making a movement described in this section, a person shall provide notice of the person's intention by giving:
(2) an appropriate stop or turn signal in the manner provided in sections 27 through 28 of this chapter.
[Pre-1991 Recodification Citation: 9-4-1-78(a).]
As added by P.L.2-1991, SEC.9. Amended by P.L.118-2022, SEC.22.