Important: The images in this article are from Google Maps on Android. The interface for Maps on Desktop and iOS might display differently.
There are 3 main alert categories in Google Maps:
- Critical
- Warning
- Informational
Each category appears differently. They're determined by the effect
field.
Categorize alerts
Effect | Alert category |
Alert icon |
Alert text | Alert color |
---|---|---|---|---|
NO_SERVICE |
Critical | No service | Red | |
SIGNIFICANT_DELAYS |
Critical | Significant delays | Red | |
REDUCED_SERVICE |
Warning | Reduced service | Orange | |
DETOUR |
Warning | Detour | Orange | |
MODIFIED_SERVICE |
Warning | Modified schedule | Orange | |
STOP_MOVED |
Warning | Stop moved | Orange | |
ADDITIONAL_SERVICE |
Informational | Extra service | Blue | |
OTHER_EFFECT /UNKNOWN_EFFECT |
Informational | Information | Blue |
COVID-19 messaging
Agencies can create COVID-19-related messages. When the cause
field shows a MEDICAL_EMERGENCY
value and the effect
field shows OTHER_EFFECT
or UNKNOWN_EFFECT
, the alert heading says "COVID-19 information" with a “Warning” alert category. Any other effect
value won’t change the alert heading or category.
Where & how alerts display
Alerts are currently represented in different ways and show up in 5 different areas on Google Maps.