The crash killed 6-year-old twin brothers Xzavier and Mason Ingle and their 9-year-old sister, Alivia Stahl as Alyssa Shepherd struck the children with her pickup truck.
Gov. Eric Holcomb signed the sweeping school bus safety bill into law. It takes effect July 1.
The measure would give school districts help in paying for school bus cameras from violation fines collected from people found guilty of passing stopped school buses.
The Indiana House Courts and Criminal Code Committee on Wednesday amended the bill to bar schools or camera vendors from making money from the camera enforcement.
The bill now goes to the House.
A father whose 9-year-old daughter was killed in a collision near Rochester said he knows the tougher penalties won't stop all drivers from disregarding school bus stop arms.
The parents Tuesday joined state lawmakers in hopes of preventing similar tragedies.
Lowe's mother, Jocelynne Lowe, said in a Facebook post that Maverik cannot walk or get out of bed by himself. She also asked for privacy for the family.
A northern Indiana woman accused of striking and killing three children with a pickup truck as they crossed a highway to board a school bus entered a preliminary not guilty plea Thursday.
Six-year-old twin brothers Xzavier and Mason Ingle, and their 9-year-old sister, Alivia Stahl, were killed.