street_limits.bin: data sources and credits

Speed limit data: City of Los Angeles Department of Transportation.
Layers retrieved 2026-10-27:
  SpeedLimits_LAMC_35mph: https://services1.arcgis.com/tp9wqSVX1AitKgjd/arcgis/rest/services/SpeedLimits_LAMC_35mph/FeatureServer/0
  City_of_Los_Angeles_Speed_Limit_Map: https://gis.dot4la.org/server/rest/services/AGOL_Feature_Classes/City_of_Los_Angeles_Speed_Limit_Map/FeatureServer/2
  SpeedLimitChange011 (AB 43 speed limit changes): https://services1.arcgis.com/tp9wqSVX1AitKgjd/arcgis/rest/services/SpeedLimitChange011_WFL1/FeatureServer/0
  SpeedLimits_CVC: https://gis.dot4la.org/server/rest/services/AGOL_Feature_Classes/SpeedLimits_CVC/FeatureServer/0
  LADOT Speed Safety System program documents (2026), per street_limits_overrides.json:
    LADOT Speed Safety System, Council District 15 camera map (2026-09): Imperial Highway, Avalon Blvd to Stanford Ave, 35 mph; LADOT's regulatory-sign inventory has 35 mph signs on this block (and older 40 mph ones); the 2018 base map's 40 is stale here: https://ladot.lacity.gov/sites/default/files/2026-09/sss-cd-15.pdf
    LADOT Speed Safety System, Council District 14 camera map (2026-09), location 14-4: S San Pedro St, E 6th St to Winston St, 40 mph; same value in LADOT's ApprovedLocations_04012026 layer (OBJECTID 81, speed_limi 40) and the Sept 2026 Speed Safety System impact report. LADOT's SpeedLimits_CVC layer (25 mph prima facie) is superseded here by LADOT's own later program documents. The Jan 2026 impact report listed 25; check the posted sign in the field: https://ladot.lacity.gov/sites/default/files/2026-09/sss-cd-14.pdf
    LADOT Speed Safety System, Council District 10 camera map (2026-09), location 10-1: S La Cienega Blvd, Coliseum St to Bowesfield St, 35 mph; same value in LADOT's ApprovedLocations_04012026 layer (OBJECTID 77, speed_limi 35). LADOT's regulatory-sign inventory has 'Speed Limit 35' signs on this block (IDs 4892, 27932, 13339) and LADOT's camera-pole survey notes a 'Speed Limit 35' sign at 3641 S La Cienega Blvd; the 2018 base map's 45 is stale here: https://ladot.lacity.gov/sites/default/files/2026-09/sss-cd-10.pdf
Stored as a normalized derived representation; the raw files are not redistributed.

Speed limits: City of Glendale Municipal Code 10.24.020 (as amended by Ord. 6040, 2025-08-19),
transcribed for the street segments listed in street_limits_overrides.json.

Contains data from: County of Los Angeles, Department of Public Works, Speed Network; eGIS road centerlines (CAMS); eGIS city boundaries.
County of Los Angeles Enterprise GIS. Accessed 2026-10-27.
https://services.arcgis.com/RmCCgQtiZLDCtblq/arcgis/rest/services/VZ_Left_Turn_Collision_Street_Elements/FeatureServer/2
https://services.arcgis.com/RmCCgQtiZLDCtblq/arcgis/rest/services/eGIS_Addressing_ROAD_LINES/FeatureServer/0
https://public.gis.lacounty.gov/public/rest/services/LACounty_Dynamic/Political_Boundaries/MapServer/19 (used to clip the LADOT layers; not redistributed)
Used under the County of Los Angeles eGIS Terms of Use. Not endorsed by the County.

Source: California Department of Transportation (Caltrans), District 7,
SHS existing conditions: Speed limit (mph). https://services1.arcgis.com/8CpMUd3fdw6aXef7/arcgis/rest/services/D7_SHS_existing_conditions/FeatureServer/22

Speed limit data (c) OpenStreetMap contributors, available under the Open Database
License 1.0 (https://opendatacommons.org/licenses/odbl/1-0/).
See https://www.openstreetmap.org/copyright.
OSM snapshot: 2026-10-27T01:31:40+00:00.
The records with source code 0 or 1 are derived from OpenStreetMap and form a
Derivative Database under the ODbL 1.0. A machine-readable copy of them and the
script that builds this file: https://speedcam.cc/data/.
Official records take no geometry or values from OpenStreetMap. OSM values only
decided where two official values are left out: LADOT's 25 mph prima facie value
where OSM has a lower limit (0.2 km at 5 mph, 0.5 km at 10 mph, 20.6 km at 15 mph, 6.4 km at 20 mph),
and 32.1 km of 2018 LADOT base-map values of 35 mph or less that the 2025
LAMC_35 layer no longer lists, where OSM has a higher limit. A build with --no-osm
has no OSM content and no OSM influence.

LA City local streets show the 25 mph prima facie limit (California Vehicle Code
22352) as labelled by LADOT. School-zone and time-of-day limits are not included.

Speed limits may be missing, outdated or wrong. Posted signs always govern.