Data Source: Traffic Accidents

Slovenian traffic accident data is fetched from the AVP WFS API (nesrece.avp-rs.si). A historical importer for the policija.si annual ZIP files used to live alongside it but has been retired — AVP supplies the same fields plus drug-test data, unique participant IDs, hot-spot flags, and incremental fetching by date range.

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Source: nesrece.avp-rs.si (AVP)

URL: http://nesrece.avp-rs.si/geo/wfsFormat: WFS (GeoServer) — supports GeoJSON, CSV, Excel, KML, Shapefile Access: Standard OGC WFS protocol with CQL filter support Layer: BSM:view_bpn_nTotal records: ~700k (704,781 as of April 2026) CRS: EPSG:3912 (Slovenian national grid)

How it works

1. Query WFS endpoint with filters (date range, region, type, etc.)
2. Paginate with startIndex + maxfeatures
3. Response is GeoJSON with Point geometry per accident
4. For each accident, call udel.php?key={key} to get the participant HTML table

The data-fetching worker (AvpAccidentsFetcher) fans out one job per day so a year-long backfill is bounded into ~365 short jobs instead of one giant one. See data-fetching/src/processors/sources/avp-accidents.fetcher.ts.

Request example

GET http://nesrece.avp-rs.si/geo/wfs?
  service=wfs&
  version=1.1.0&
  request=getfeature&
  typename=BSM:view_bpn_n&
  outputformat=application/json&
  maxfeatures=1000&
  startIndex=0&
  cql_filter=datum >= '2025-01-01' AND datum <= '2025-12-31'

Supported CQL filters

Filter	Example
Date range	datum >= '2025-01-01' AND datum <= '2025-12-31'
Region	regijao = 'OSREDNJESLOVENSKA'
Municipality	obcinao = 'LJUBLJANA'
Classification	klas = 'S' (S=death, H=serious, L=light, B=none)
Cause	vzrok = 'HI' (HI=speed, PD=priority, etc.)
Type	tip = 'ČT' (ČT=head-on, BT=side, NT=rear-end, etc.)
Weather	vreme = 'D' (D=rain, J=clear, M=fog, S=snow)
Road type	lovc = '0' (0=motorway, 1=main I, H=expressway, etc.)
Bbox	BBOX(the_geom, 400000, 50000, 600000, 200000)
Participants	st_oseb > 2

Accident fields

Field	Description	Example
key	Accident ID	001013229
datum	Date (ISO)	2022-12-29Z
mesec	Month	12
dan	Day of week (0=Sun)	5
dannoc	Day/night	dan
ura_int1	Hour interval	23-24
regijao	Statistical region	PODRAVSKA
obcinao	Municipality	MARIBOR
klas	Classification code	S / H / L / P / B / O
priority	Priority (severity rank)	4
tip	Accident type code	ČT / BT / NT / TO / ...
vzrok	Cause code	HI / PD / SV / PR / ...
vreme	Weather code	J / D / M / S / ...
povrsje	Road surface code	SU / MO / SN / ...
vozisce	Road pavement code	AH / AN / AZ / MA
promet	Traffic code	N / G / R / Z
lovc	Road class code	0–5, H, L, N, T, V
nas	Settlement (D/N)	D
kraj	Location type code	C / R / Z / P / ...
cesta	Road number	102
odsek	Section number	1006
stac	Chainage	000005900
pcestao	Road name	ROBIČ-IDRIJA-LOGATEC
podseko	Section name	IDRSKO-PERŠETI
osebe	Participants (compressed)	{D;OA;[25-34];0;0;P;0,N;PT;...}
st_oseb	Number of participants	3
ishs	Is "hot spot"	true / false
the_geom	Point (EPSG:3912)	[461234, 100567]

Participant detail endpoint

No WFS/API exists for participants. The GeoServer only exposes BSM:view_bpn_n (accidents). The REST API is locked (401). The only way to get detailed participant records is this PHP endpoint. No JSON variant — ?format=json still returns HTML.

URL: http://nesrece.avp-rs.si/udel.php?key={accident_id}Format: HTML table (one row per participant, needs parsing) Access: GET request with the accident key field

Field	Description	Example
idpn	Accident ID	001111922
ID osebe	Participant ID (unique)	009265399
datum	Date (DD.MM.YYYY)	21.04.2025
udeleženec	Participant type	voznik osebnega avtomobila
poškodba	Injury type	huda telesna poškodba
povzročitelj	Causer (da/ne)	ne
spol	Sex	ženska / moški
starost	Exact age	59
zaščita	Safety equipment (da/ne)	da
staž	Driving experience (YYL MMM)	01L03M = 1 year 3 months
državljanstvo	Citizenship	SLOVENIJA
alkotest odrejen	Breathalyzer ordered (D/N)	D
alkotest	Breathalyzer result	NEGATIVEN / POZITIVEN
alkotest vrednost	Breathalyzer value	0.00
etilometer odrejen	Ethylometer ordered (D/N)	N
etilometer	Ethylometer result	(empty if not ordered)
etilometer vrednost	Ethylometer value	0.00
str. pr. odrejen	Medical exam ordered (D/N)	D
str. pr.	Medical exam result	POZITIVEN
str. pr. vrednost	Medical exam value	01.76
str. pr. mamila odrejen	Drug test ordered (D/N)	D
str. pr. mamila	Drug test result	(empty)
str. pr. mamila vrednost	Drug test value	N
mamila hitri test	Rapid drug test	N

Notes & caveats

• HTTP only (no TLS listener on the host).
• Participant detail requires one HTTP call per accident; the per-day fetch model keeps the working set bounded (~50–150 accidents/day → ~50–150 follow-up calls).
• Coordinates are in EPSG:3912 — projected to WGS84 by data-processing/src/common/coordinate-projector.ts.
• No documented rate limits — fetcher uses sequential per-day jobs to be polite.