Luján is the crossroads of western Buenos Aires province: the Acceso Oeste and Route 7 towards Mendoza, Route 5 towards Santa Rosa and Route 6 around the suburbs meet next to the city of the basilica, with an industrial park, the towns of Jáuregui and Open Door and several pilgrimages a year that fill its approaches with coaches and cars from all over the country. Municipal fines are issued by the partido; route and provincial fines coexist on the same plates.

Context and authority

The partido adheres to the National Traffic Law 24.449 through the provincial law: fines are expressed in fixed units and lapse after two years if minor and five if serious. Municipal fines are ruled on by the partido’s misdemeanour court; those issued by the province follow their own circuit, described in the Buenos Aires article.

The municipal misdemeanour court rules on fines issued within the partido: parking and lanes downtown and at the approaches to the basilica, especially on pilgrimage days, speeding and red lights on the camera avenues and manoeuvres at the industrial park approaches. A defence is filed with the court within the period set by the notice; fines on Routes 5, 6 and 7 are not municipal.

What the API returns for this jurisdiction

A plate lookup in Luján walks the Luján municipal misdemeanour court together with the integrated provincial sources of Buenos Aires, and returns each fine with the authority that issued it:

  • Authority and fine number exactly as each court publishes them.
  • Date, location when reported and description of the infraction.
  • Amount, status and payment conditions published by that court.
  • Downloadable payment slip when one exists.
  • Coverage per source and partial-result flag.

How to check a plate in Luján

A plate is checked by hand at the Luján municipal portal, in the provincial sources explained in the Buenos Aires article and at the ANSV national lookup. The API does the same round at scale and returns each fine with the authority that issued it, so verification becomes part of the process rather than a spreadsheet.

What to watch if you run a fleet in Luján

A coach company taking pilgrims or groups to Luján concentrates its parking and lane fines in a few weekends a year; looking up each plate thirty days after each event, with the per-source result stored, assigns each fine to the service and collects the discount before the court rules.

For a cargo fleet using the junction of Route 5 and Route 7 daily, Luján’s municipal fines are few and the route fines are provincial; the same lookup returns both separately and avoids mixing two circuits with different deadlines.

How to integrate

The integration starts with one POST per plate, with the jurisdiction as an optional filter. Since courts answer at their own pace, the API accepts the job and delivers the result by status or webhook; store the idempotency key before sending, as the asynchronous APIs guide describes. The API page details access.

JSONIllustrative example, not a contract.
{
  "plate": "ABC123",
  "jurisdictions": [
    "AR-B-lujan"
  ]
}

Limits and considerations

  • Fines on the Acceso Oeste and on Routes 5, 6 and 7 belong to the concessionaire, the province or the nation, not the municipality; the response names the authority of each.
  • Fixed-unit amounts are converted at the value current at the source; the final amount is set by the authority at the time of payment.
  • A source that does not answer is reported as such, never as an absence of infractions.
  • The API neither pays fines nor handles defences; it delivers information to decide.

Sources and further reading