Arlene 
2016 Toyota RAV4 SUV XLE 4dr SUV (2.5L 4cyl 6A)
What good are safety signals they can't be heard
 What good are safety signals if they can't be heard above a radio. or even road noise if the windows or moon roof is open. The lane drift would never be heard if a person falls to sleep.  I asked about making them louder but was told it was impossible