Indiana Code - Motor Vehicles - Title 9, Section 9-19-14-2

Signal lamps; visibility

Sec. 2. Except as provided in section 5 of this chapter, an
authorized emergency vehicle must, in addition to other equipment
required by this article, be equipped with signal lamps that are
capable of displaying flashing, rotating, or oscillating beams of red
or red and white light. The lights must be visible to oncoming traffic
one hundred eighty (180) degrees around the front of the vehicle.
As added by P.L.2-1991, SEC.7.

Last modified: May 27, 2006