Círculo verde / rojo (customs light)

The círculo verde / rojo, often called the semáforo fiscal, is the visible output of Mexico's mecanismo de selección automatizado. When a truck presents its pedimento at the aduana module, the system randomly (weighted by risk profile) returns green or red. Green means immediate release: the truck rolls. Red means reconocimiento aduanero, a physical inspection of the cargo against the paperwork.

What this means when you move freight

You cannot control the light, but you control how much a red light costs. A red on a clean shipment with an exact packing list and correct tariff classification is an inconvenience measured in hours. A red on a shipment with vague descriptions, count mismatches, or labeling gaps can escalate into document corrections, penalties, and a trailer stuck at the border for days. This is exactly why agentes aduanales run a previo before filing: the goal is that any red light finds nothing to disagree with.

When quoting cross-border transit times, treat the light as a probability, not an exception. Experienced carriers pad a crossing window rather than promising the best case, and experienced brokers explain the mechanism to shippers up front. A red light is routine customs process, and communicating it that way keeps everyone calm while the exam runs.