What This Is
Crestmap combines public CHP traffic incidents with selected WildWeb dispatch reports for Angeles Crest, Angeles Forest, Big Tujunga, Glendora Mountain, and nearby forest roads.
206Incidents in this window
0Active CHP incidents
163Mapped incidents
1–2mIncident source cadence
Update Cadence
CHPChecked about once per minute.
WildWebChecked independently about once every two minutes. Reports older than the configured collection window are archived.
Active incident detailsUnchanged active incidents are refreshed about every 3 minutes.
Air temperatureChecked about every 15 minutes while the temperature layer is enabled and the page is visible. Also checked when you return to the tab or reconnect. Weather responses may be reused for up to 15 minutes; station observation times and forecast validity times can be earlier than the check time.
Road-weather forecasts and NWS alertsChecked together about every 15 minutes while the road-weather layer is enabled and the page is visible. Also checked when you return to the tab or reconnect. Responses may be reused for up to 15 minutes. Forecasts cover the next six hours.
Status meaningCHP records use Active and Cleared. WildWeb records say Reported unless the source explicitly provides Contained, Controlled, or Out. No longer listed and Archived do not mean Crestmap independently confirmed the incident is over. Map badges use red for active, amber for reported, and gray for cleared or archived; the pictograph shows the incident type.
HistoryCleared and archived records stay in the database and are shown when they fall inside the selected time window.
Push Notifications
Crestmap can notify you when it discovers a new matching incident. CHP alerts are selected by default; WildWeb reports are a separate opt-in because the two sources can describe the same incident. Choose sources, areas, and incident categories in Alerts.
Crest + west forestIncludes Angeles Crest, Angeles Forest, Big Tujunga, and Mount Wilson/Red Box incidents. It excludes San Gabriel Canyon, Glendora Mountain/Ridge, Mount Baldy, and San Antonio Canyon incidents.
iPhone and iPadOpen Crestmap in Safari. With Compact tabs, tap More (…) then Share; with Bottom or Top tabs, tap Share directly. Scroll down and choose Add to Home Screen. If it is missing, scroll to the bottom, open Edit Actions, and add it. Turn on Open as Web App, tap Add, then launch Crestmap from the new icon. Open Alerts from the menu and approve the notification prompt.
PrivacyA browser-generated push endpoint and your choices are stored. No email address, phone number, or account is required. Turning alerts off deactivates that device subscription.
DeliveryNotifications are sent only for newly discovered incidents after you subscribe. Delivery can be delayed or suppressed by Focus, Low Power settings, connectivity, or browser notification settings.
Data Sources and Attribution
CHP sourceCalifornia Highway Patrol traffic incidents from the CHP media XML feed. The CHP CAD page is also available for reference.
WildWeb sourcewildwebe.net · CAANCC
Camera sourceALERTCalifornia | UC San Diego
Air-temperature sourcesNational Weather Service station observations and Open-Meteo elevation-adjusted model estimates and six-hour forecasts. Forecasts shown alongside station observations also come from Open-Meteo.
Road-weather sourcesNational Weather Service active alerts and Open-Meteo six-hour elevation-aware precipitation forecasts. Road-weather markers are forecasts, not measured pavement conditions.
Mile-marker sourcesAngeles Crest marker positions are interpolated from the Caltrans Linear Referencing System for SR-2 using Caltrans postmiles. Other forest corridors use LA County Public Works surveyed markers.
Weather data licenseOpen-Meteo data is provided under CC BY 4.0; see the Open-Meteo attribution and license information. Crestmap selects and formats forecasts and derives road-weather indicators from them. NOAA/NWS data is public domain unless otherwise noted.
Map data© OpenStreetMap contributors. Map data is available under the Open Database License (ODbL); base map tiles are provided by OpenStreetMap.
Aircraft sourceAircraft positions are provided by The OpenSky Network. See its data license and terms of use.
Project Links
Project READMEgithub.com/cajaks2/crestmap