You just got a letter that says a crash report or ticket lists "failure to signal," and that usually means a driver changed lanes, turned, started from a parked position, or slowed down without giving enough warning to other drivers. In plain terms, it is a traffic violation based on not using a turn signal or other required signal when the law expects it. The basic issue is foreseeability: other people on the road need notice before a vehicle moves in a way that could create danger.

That matters fast after a wreck because a failure-to-signal allegation can shape who gets blamed. It may appear on a ticket, in a police report, or in an insurer's decision about fault. If a driver cut across traffic on a two-lane stretch of US-59/I-69 without signaling, for example, that can support an argument that the driver acted carelessly and caused the collision. In an injury case, that can become evidence of negligence.

In Texas, signaling duties are addressed in Texas Transportation Code § 545.104 (2025). A violation does not automatically prove legal liability, but it can strongly affect settlement talks, witness credibility, and any claim for damages. The clock is short: most Texas personal injury claims have a 2-year statute of limitations under Texas Civil Practice and Remedies Code § 16.003 (2025), and claims against a government entity may require notice within 6 months under the Texas Tort Claims Act (2025).