Permanent project revision
Revision 2026-10-05-p4-quality-run · effective 2026-10-05
Current revision. This is the snapshot used by the live entity page.
Quality run to P4: claim array, source dates, present-tense audit. The 2026 season ran 4 May to 31 August as described (MTT page now readable, BioBio, Pauta). Enforcement is not purely manual: BioBio (3 May 2026) lists the region's tele-surveillance camera network alongside Carabineros and MTT inspectors, and Pauta (10 Aug 2026) says the transport secretariat has plate-recording cameras. The CATI line misdated the minister's statement (it was August 2025). Three source dates
sha256:28218e7d254ed75cf26893d3d9551d2573e70e84476c61d9cd92d6259bb4d083
replace /snapshot/projectFingerprint — Updated projectFingerprint to the current sourced project record.replace /snapshot/asOf — Updated asOf to the current sourced project record.replace /snapshot/claims — Updated claims to the current sourced project record.replace /snapshot/sources — Updated sources to the current sourced project record.The text below is copied verbatim from the published record. Each claim names the source dossiers that carry it; caveats stay attached to the claim they qualify.
clm-21921fc573e05081
quantitative
Santiago rations driving by the last digit of the licence plate across the 32 comunas of the Provincia de Santiago plus San Bernardo and Puente Alto, weekdays 07:30 to 21:00 through the May-to-August pollution season
clm-582901cd0bf4395a
quantitative
Catalytic cars carrying the sello verde and registered before 1 September 2011 lose two digits a day
clm-45b4c301a72b8e5c
descriptive
older vehicles without the seal lose four and are barred outright from the Americo Vespucio ring
clm-e524ac06b73726f8
descriptive
newer cars go free until an episode is declared
clm-e4b29b75a6a6cf64
quantitative
the environment ministry's Metropolitan secretariat works from the regional air-quality monitoring network and from separate MP10 and MP2.5 forecasting systems
clm-3eda50f5e2a6baa4
descriptive
each step up to Alerta, Preemergencia or Emergencia adds digits to the ban
clm-3fa26000e919b4d8
descriptive
Enforcement rests on Carabineros, municipal inspectors and the transport ministry's inspection unit, backed by the region's camera network, which records licence plates
clm-77142cdfbe6dd5dd
quantitative
a violation costs 1 to 1.5 UTM
clm-9b68aad5d5477977
quantitative
The CATI law lists the driving restriction among the infractions cameras may sanction automatically, and in August 2025 the transport minister expected it to take effect during 2026
clm-a48b622008615987
quantitative
found the temporary bans reduce car trips by 6-9% during peak hours and by 7-8% off-peak
clm-fc4784eb19b4a317
descriptive
exploited the air-quality index thresholds that announce the warnings as instruments in a fuzzy regression discontinuity design
clm-93a9e2910332327a
descriptive
consistent with air pollution reductions during peak hours and with higher ridership on Santiago's mass-transit systems in hours when they run with excess capacity
clm-51a79dd1965d948c
descriptive
the ration is set by a vehicle's vintage class and re-set by an air-quality reading
This layer records what is known about each source, what is still missing, and the exact snapshot this page is rendering. A missing date, archive or hash stays visible as missing.
Awaiting operator and domain-expert review; publication of this revision implies neither.
sha256:28218e7d254ed75cf26893d3d9551d2573e70e84476c61d9cd92d6259bb4d083
src-48214fd6b8b1e2aaThe transport ministry's own standing page for the measure, the correct primary citation for the calendar and the exemption rules. Direct fetch returned HTTP 503 twice from this desk on 2026-07-26; every fact it would carry is instead sourced to the environment ministry and BioBioChile entries below, which agree on dates, comunas, hours and digit tables.
src-4a961397ed94dc15Fetched. Dates the GEC period 1 May to 31 August; states the permanent restriction falls on sello verde vehicles registered 2011 and earlier and motorcycles 2010 and earlier across the Provincia de Santiago, San Bernardo and Puente Alto, with non-seal vehicles banned from the Americo Vespucio ring; gives the weekly digit cycle from 4 May and the 07:30-21:00 window; and states that when Alerta, Preemergencia or Emergencia is decreed further digits are added to the ban. Also the source for the Seremi de Transportes handling exemption authorisations.
src-f1e5a8733c692517Fetched. Names the two instruments behind the episode declaration: the Sistema de Vigilancia de Calidad del Aire operated by the environment ministry, and the Sistema de Pronostico, with MP10 forecasting administered by the Direccion Meteorologica de Chile and MP2.5 by the MMA. The page does not publish the numeric declaration thresholds, so no threshold value is quoted in this entry. The linked Plan Operacional GEC 2026 PDF was retrieved but did not yield legible verbatim text to this desk.
src-9e53dd6f17b42ca4Abstract fetched verbatim and the sole source of every figure in the impact field: 'these temporary bans reduce car trips by 6-9% during peak hours, and by 7-8% during off-peak hours. This is consistent with air pollution reductions during peak hours, and with increases in the use of Santiago's mass-transit systems during hours the systems run with excess capacity.' Also the independent confirmation of the trigger layer, since the identification strategy is 'a fuzzy regression discontinuity design that uses the thresholds in the air quality index used to announce these warnings as instruments for their announcement.'
src-317c1a1978c4206cAbstract fetched. Dates the vintage-specific design to Santiago's 1992 programme and calls it the earliest to use vintage-specific restrictions, which is the basis for this entry's yearStart. Argues that uniform restrictions encourage drivers to buy additional, more-polluting vehicles, while vintage-specific ones can 'yield important welfare gains by moving the fleet composition toward cleaner cars' and should work through which car is driven rather than how much it is driven. Cited for design and dating; it is a modelling paper and carries no measured air-quality result here.
src-d124edf6a61ee694Listed because it is the standard evaluation of Santiago's episode restrictions against measured concentrations from the monitoring network. Fetch returned HTTP 403 from this desk on 2026-07-26 and the abstract could not be read in full, so no figure from it is used anywhere in this entry.
src-f544e9ee238ef3baFetched. Confirms the automated enforcement law is not yet in force, that the transport minister expects it during 2026, and that the four infraction types it will automate include restriccion vehicular alongside red lights, speeding and bus-only lanes. This is the source for the entry declining to claim any camera enforcement today, against several Chilean commercial blogs that assert a 400-point plate-reading network is already issuing restriccion tickets.
src-cb633e26d2ea29ceFetched. Independent corroboration of the operating rules while the ministry page was down: 4 May to 31 August, Monday to Friday except holidays 07:30 to 21:00, provincia de Santiago plus San Bernardo and Puente Alto; catalytic cars registered before 1 September 2011 and motorcycles before 2010 on two digits a day, non-seal vehicles on four with 'prohibicion absoluta para circular' inside the Americo Vespucio ring; fine of 1 to 1.5 UTM; 'La medida sera fiscalizada por Carabineros, en conjunto con la Unidad de Fiscalizacion del Ministerio de Transportes.'
src-78c81bbbfdca5805Season ends 31 August 2026; fine 1 to 1.5 UTM set by the local police court; enforcement by Carabineros, municipal inspectors and MTT inspectors, and the Seremi de Transportes has camera systems that record licence plates to detect infractions.