They are meant to be used as a warning device to the people around you, so other drivers have an idea as to what you are preparing to do.
Most people are not mindreaders, so it helps us out when we get a "heads up" as to which way your vehicle if preparing to move. It is also the law which states you much give at least a 100-foot signal when preparing to turn or change lanes (readers digest version). You also need to signal when preparing to move from a parked position.
Please make sure that just because someone does signal, you don't take for granted the driver actually does as he or she is signaling.
There is an old saying which states, “Don't put your life in the trust of someone else's blinker". Signaling is also some indication drivers are paying attention to what they are doing while operating a vehicle. Many of the drivers we observe not using their signals are distracted drivers (eating, texting, talking, etc.). Please pay attention to everyone around you and use those signals.
Also, be sure to follow the Ellis County Sheriff's Department on Twitter at @ECSOTX and on Facebook at "Ellis County Sheriff Office." Please join the Waxahachie Police Department and us on Jan. 29 for Coffee with a Cop at the Whataburger located at 604 N Hwy 77 Waxahachie from 7—9 a.m. No politics or speeches but just good communication between local law enforcement and local citizens. We will be doing our KBEC broadcast live from Whataburger at 8 a.m.