If you drive on Dallas freeways such as Interstate 35E, Interstate 30, Central Expressway, or the LBJ, you have probably passed a patrol car or a tow truck parked on the shoulder with its lights flashing. What you do next is not just a matter of courtesy. Texas law tells drivers exactly how to respond, and the rules apply throughout Dallas, from busy highways to quiet neighborhood streets. Understanding them can keep roadside workers safe, protect you from a costly ticket, and may even save a life.
What the Law Requires
Texas calls its rule the “Move Over or Slow Down” law, and it lives in the state Transportation Code, which means it applies in Dallas just as it does everywhere else in Texas. When you approach a stopped vehicle that has its overhead lights flashing, you must do one of two things. If the road has at least two lanes going in your direction, you should move over to a lane that is not next to the stopped vehicle, as long as you can do so safely. If you cannot change lanes safely, or if the road has only one lane in your direction, you must slow down. Specifically, you must reduce your speed to twenty miles per hour below the posted limit, or to five miles per hour when the posted limit is twenty-five miles per hour or less.
Which Vehicles Are Covered
The law protects a wide group of people who work along the roadside. Covered vehicles include police cars, fire trucks, and ambulances, as well as tow trucks, Texas Department of Transportation vehicles, utility service vehicles, and municipal waste collection trucks. A recent expansion that took effect in September 2025 added animal control officers and parking enforcement vehicles. The common thread is a stopped vehicle with activated lights, whether the lights are red, blue, or amber. If you see flashing lights on the shoulder or beside your lane, treat the situation as one that requires action.
Why Lawmakers Care So Much
Roadside work ranks among the most dangerous jobs in America. Officers making traffic stops, tow operators clearing wrecks, and utility crews repairing lines stand just feet from vehicles traveling at highway speeds. A moment of inattention can lead to a collision that kills or injures someone who was simply doing a job. Texas lawmakers have expanded the law over the years to extend its protection to more workers, and the 2025 changes show that the trend continues.
Penalties for Violating the Law
Failing to move over or slow down can lead to a traffic citation and a fine that, according to recent state transportation department guidance, can reach more than one thousand dollars for a first offense. If a violation causes serious injury, the consequences can be much harsher, including possible jail time and fines of several thousand dollars. A crash can also trigger civil liability, since an injured worker or the worker’s family may sue the driver, and a citation can raise your insurance rates. Penalties can change when the Legislature amends the law, so check the current statute or the state’s official guidance for exact amounts.
Practical Tips for Dallas Drivers
Heavy traffic is a fact of life in Dallas, so plan ahead. Scan the road well in front of you and watch for flashing lights early, since a sudden move across several lanes can cause a collision of its own. Use your turn signal and check your mirrors and blind spot before changing lanes. If traffic blocks you from moving over, ease off the accelerator and slow down as the law requires, rather than hitting the brakes abruptly. Keep a safe distance behind the car ahead so you can adjust smoothly, put your phone away, and resist the urge to slow down to stare at an incident, a habit that creates backups and secondary crashes.
What If You Are the One Stopped on the Roadside?
Drivers sometimes forget that the law exists to protect them too, whenever a covered vehicle is involved. If your car breaks down, pull as far from traffic as possible, turn on your hazard lights, and stay with the vehicle unless you can move to a safe place such as behind a guardrail. Call for help and keep your seat belt on until help arrives. Remember that the law specifically covers the vehicles listed above, so a stalled personal car does not trigger the same legal requirement, but many drivers still choose to move over as a courtesy.
Final Thoughts
The rule is simple: when you see flashing lights on the side of the road, give the people there room or slow down. Doing so takes only a few seconds and costs you almost nothing, while ignoring it can cost a worker’s life and leave you facing criminal and civil consequences. Next time you travel through Dallas and spot flashing lights ahead, check your mirrors, signal, and move over. The person on the shoulder is counting on you.
