You can usually report a dangerous driver by getting yourself safe, gathering key details about what you saw, and then contacting police through the appropriate emergency or nonā€‘emergency channel in your area. In many places you can also submit online forms or dashcam footage, and some regions offer hotlines or apps specifically for aggressive or reckless driving reports.

First priority: your safety

  • Move to a safe place before calling or writing anything; do not try to film, call, or write notes while you are driving.
  • Do not chase or confront the driver, even if you are angry; this can escalate into road rage or put you in more danger.

When to call emergency services

  • If the driving is an immediate threat to life (for example, extreme speeding in traffic, obvious drunk or drugā€‘impaired driving, deliberate swerving at others), call your local emergency number (such as 911) right away.
  • On some highways, there may be special short codes (like #77 in some U.S. states) that connect you directly to highway patrol for reckless drivers.

Using nonā€‘emergency options

If the situation is no longer in progress or is serious but not an immediate emergency:

  • Call the nonā€‘emergency police number (for example, 101 in the UK, or your local dispatch line in the U.S.) and explain that you want to report dangerous or aggressive driving.
  • Many police departments now offer online traffic or ā€œaggressive drivingā€ report forms on their websites where you can submit details and, in some cases, upload video.

Some regions or cities also provide:

  • Dedicated ā€œroad rageā€ or aggressive driving hotlines run by the police or traffic units.
  • Community or thirdā€‘party reporting platforms that collect license plates and incident descriptions; these may supplement, but not replace, an official police report.

What details to collect

When it is safe to do so, note as much as you can:

  • Vehicle registration (license plate) number.
  • Vehicle color, make, model, and any distinguishing marks (damage, stickers, business logo).
  • Exact time and date, and location (city, road, direction of travel, nearby junctions or landmarks).
  • What the driver did: speeding, tailgating, running red lights, using a phone, racing, forcing others off the road, etc.
  • Any video or photo evidence, such as dashcam footage, taken only once you are safely stopped.

How your report is usually handled

  • Police or traffic units review your report and any evidence, check for similar complaints, and decide whether to investigate, warn the registered owner, increase patrols, or pursue charges such as careless or dangerous driving.
  • You might not get detailed feedback due to privacy and caseā€‘handling rules, but thorough, factual reports (especially with dates, times, and plates) are more likely to lead to action.

TL;DR:
Get to safety, gather details (plate, car, location, behavior), and contact emergency services if lives are at risk or your local nonā€‘emergency/online channels if the threat has passed. Dashcam or phone video captured safely and shared through official reporting channels can significantly strengthen your report and help traffic units target repeat offenders.

Information gathered from public forums or data available on the internet and portrayed here.