If an officer recently asked you to walk a line, stand on one leg, or follow a pen with your eyes, you’re probably replaying every wobble and telling yourself you failed. I want to slow that tape down. Those roadside exercises were never the pass or fail exam you think they were, and the report that says failed is a claim, not a verdict.
I’m Rory Safir. I was an Assistant Public Defender in Tampa, and I’m an NHTSA qualified field sobriety instructor, trained through the same federal curriculum that trains the officers. I wrote a free guide, The Roadside Exercises, that takes the roadside apart piece by piece. Here are three things from it.
Three things from the guide
Only three exercises are standardized, and their numbers are modest
The eye exercise, the walk and turn, and the one leg stand are the only three with validation research behind them. Under ideal laboratory conditions, they were right about 77, 68, and 65 percent of the time. And right about what? A blood alcohol level of 0.10 or higher. They do not measure impairment, and they do not measure driving. The alphabet, finger to nose, and the other extras have no validation study and no official scoring at all.
Change one element and the validity is compromised
The government’s own materials say these exercises are valid only when run exactly by the book. The research assumed a level, dry surface, a real line, decent lighting, and clear instructions. Your roadside had a sloped shoulder, darkness, traffic a few feet away, wind, and whatever shoes you happened to be wearing. Every departure is a changed element, and the guide shows how I put the video next to the officer’s own manual, step by step, to find the ones that matter.
You could have said no, and it is not the same as refusing
In Florida, the roadside exercises are generally voluntary, with no automatic license penalty for declining them. That is a completely different decision from refusing a breath or blood test after a lawful arrest, which carries statutory consequences of its own. Officers rarely spell out the difference. If you did the exercises anyway, so does nearly everyone, and the guide explains why your age, weight, knees, footwear, fatigue, and nerves all belong in your file. Each one produces clues, and none of them are alcohol.
Where to get it
The guide is free, and one email unlocks it along with the whole Safir Guides library at thesafirlawyer.com/free-guides. The full treatment on the web lives in the full field sobriety section of my site.
If your matter is urgent, don’t grade yourself. Skip the reading and call or text me at (727) 761-4318. Every case is different, and nothing here promises a result, but nobody should accept the word failed before someone trained as an instructor has watched the video. You’re better Safir than sorry.
About the author
Rory Safir is a St. Petersburg attorney who handles injury claims and criminal defense across the Tampa Bay area. He is one of a handful of ACS-CHAL Forensic Lawyer-Scientists in Florida and a former Assistant Public Defender in Tampa, and he brings that same evidence-driven approach to fighting for injured clients.
