this statute establishes appropriate signals for use when signals are required while stopping, turning, changing lanes or suddenly decelerating a vehicle. It doesn't authorize using hand & arm signals when signal lights are required per 811.405 (failure to signal with lights). The vehicle lighting equipment described are those established per 816.100 (brake lights - defined) & 816.120 (turn signals - defined). Appropriate signals are as follows:

(1) to indicate a left turn either:

(a) hand & arm extended horizontally from the vehicle's left side

(b) activation of the the vehicle's left front & rear turn signal lights

(2) to indicate a right turn either:

(a) hand & arm extended upward from the vehicle's left side. A bicyclist may extend their right hand & arm horizontally

(b) activate the vehicle's right front and rear turn signal lights

(3) To indicate a stop or a speed decrease either:

(a) hand & arm extended downward from vehicle's left side of the vehicle

(b) Activate of the vehicle's brake lights

(4) lane change by activating the vehicle's front & rear turn signal lights on the side where the lane change is being made.