The rule is short and unforgiving. For an on-duty railroad worker, the legal limit for blood alcohol concentration is zero. Not 0.04, not a trace. Zero. Anyone who would register a BAC above 0.00 has no business in a rail yard when the shift whistle blows. The same goes for drugs. Workers on the clock cannot have any measurable amount of certain controlled substances in their system. Those two ideas, stripped to their core, are what railroaders know as Rule G. If you are a railroad worker trying to understand how this rule affects your rights, or you have already run into trouble and need a FELA lawyer, it helps to know exactly what the rule says and how it is applied.
We have represented injured railroad workers for decades, and that work runs in our blood. Our firm was founded by a former Norfolk Southern employee who was hurt on the job, went to law school, and built a practice around helping other injured railroaders. Railroad injury law is a large part of what we do, and Rule G sits at the center of many of these cases.
What Rule G Actually Prohibits
At its heart, Rule G bars two things during a shift: alcohol and certain drugs. The alcohol side is simple. Any measurable amount is a violation.
The drug side is more detailed. Workers on duty cannot have measurable amounts of Schedule I or Schedule II controlled substances in their system. The substances of greatest concern include:
- Marijuana
- Cocaine
- Amphetamines and methamphetamines
- Heroin
- Opioid painkillers such as oxycodone, hydrocodone, and hydromorphone
The purpose behind all of this is safety, plain and simple. Rule G exists to protect the individual worker, everyone else working in and around the trains, and the residents of the towns those trains roll through. Sober workers are safer workers, and on the railroad the margin for error is unforgiving.
The rule’s odd name comes from history. It was traditionally listed as item G in railroad corporate training manuals, and the label stuck. Today the substance of the rule lives in federal law, primarily at 49 C.F.R. Part 219, which governs the control of alcohol and drug use in railroad operations.
Why a Rule G Violation Is So Serious
Beyond cutting the risk of accidents, injuries, and deaths, complying with Rule G matters for a reason many workers do not fully appreciate until it is too late. Railroad companies have the legal authority to fire a worker on the spot for a violation. There is often no second chance and no lengthy disciplinary process.
The consequences reach even further if you are hurt. Testing positive for alcohol or drugs after a reported on-the-job accident can strip you of your right to file a claim under the Federal Employers Liability Act. A Rule G violation can override your FELA rights no matter how clearly negligent the railroad or its managers were. Even if the company plainly caused your injury, a positive test can sink your claim. That is why a FELA lawyer will always look closely at the testing that followed any workplace accident.
Expect Strict Enforcement
Federal regulations require railroads to exercise due diligence in enforcing Rule G, and the law gives them broad power to do it. Railroads test their employees for alcohol and drugs through several different channels, and much of it happens without warning.
Random testing is a core part of the system. The Federal Railroad Administration sets minimum annual random testing rates each year based on the industry’s recent violation data. For 2025, the FRA kept those minimums steady. According to the Federal Railroad Administration, covered service and maintenance-of-way employees face a minimum random rate of 25 percent for drugs and 10 percent for alcohol, while mechanical employees face higher minimums of 50 percent for drugs and 25 percent for alcohol. These are floors, not ceilings, and railroads may test at higher rates if they choose.
Random screening is only one trigger. Railroads also administer tests in other situations, including:
- After a reportable accident, when post-accident testing rules apply
- When a supervisor, manager, or coworker has reasonable suspicion that an employee reported for duty impaired
- On a pre-employment basis, and for return-to-duty and follow-up testing after a prior violation
Refusing to provide a sample carries its own penalty. An employee who declines to give a urine or blood sample when properly asked can be fired or suspended for the refusal alone, regardless of whether they were actually impaired.
At the same time, the regulations require railroads to offer education, prevention, identification, intervention, and rehabilitation programs for alcohol and drug use. That requirement gives companies a reason to run their testing programs consistently rather than treating them as an afterthought.
The Limited Exemption for Prescription Painkillers
There is one narrow area where the zero-tolerance approach softens. Railroad work is hard on the body. Few engineers, conductors, brakemen, signalmen, trackmen, mechanics, or maintenance of way workers make it through an entire career without an injury serious enough to require time off and, sometimes, prescription pain medication.
A federal action in 2017 created a very limited exemption to Rule G for the use of prescribed opioids to treat and manage pain. You can read the underlying announcement from the U.S. Department of Transportation.
To qualify, a worker must meet strict conditions. There must be a valid, current prescription for each medication detected in the blood or urine sample. The concentration of the prescribed medication also has to fall within accepted therapeutic ranges. In other words, the exemption protects a worker who is legitimately treating pain under a doctor’s care. It does nothing for someone using opioids without a prescription or at levels beyond what was prescribed.
Why the Right Legal Help Matters
Rule G cases can turn a strong injury claim into a fight over test results and procedures. Whether a sample was collected properly, whether a prescription was valid, whether a concentration truly fell outside therapeutic ranges: these details can decide the outcome of an entire case. Our firm handles these disputes regularly as part of our railroad and FELA practice, and we know how railroads use Rule G to defeat otherwise valid claims.
Two things shape how we approach this work. First, our roots are in railroad injury law. The firm was built by an injured railroad worker for injured railroad workers, and we have handled hundreds of FELA cases in the years since. Second, our attorneys bring more than 100 years of combined legal experience to these claims, which matters when a railroad and its lawyers start disputing the medical and testing evidence.
Those efforts have produced real results. In one FELA matter, we obtained an $8.6 million jury verdict for a railroad worker in a case involving occupational disease, a verdict later affirmed on the negligence findings by the state’s highest court. Every case depends on its own facts, but outcomes like that reflect the resources we put into building a railroad worker’s claim.
Talk to Us About Your Railroad Injury
If you have been hurt on the job and you are worried about how Rule G or a post-accident test might affect your case, a FELA lawyer at Shapiro, Washburn & Sharp can review the facts, explain your rights under federal law, and fight to protect your claim. Contact us at 833-997-1774 for a free consultation. We have offices in Virginia Beach, Portsmouth, Suffolk, Hampton, Norfolk, and Chesapeake, and we are ready to stand with you and your family after a railroad injury.