“Our predictive traffic models are also a key part of how Google Maps determines driving routes,” the Google website continues. “If we predict that traffic is likely to become heavy in one direction, we’ll automatically find you a lower-traffic alternative. We also look at a number of other factors, like road quality. Is the road paved or unpaved, or covered in gravel, dirt or mud?”
Drivers can also report problems such as accidents and hazards through Google Maps, Apple Maps, and Waze, though the options vary by app and region. These reports help explain why traffic has slowed down. Google says it also uses data from local governments, which can flag road restrictions such as construction.
The colored lines on the map show where traffic is building. In most navigational systems, green means no traffic delays, orange means medium traffic, and red means delays, with darker red indicating slower speeds.
How Accurate Are Google Maps, Apple Maps, and Waze Traffic Updates?
Traffic updates are generally useful, but they aren’t always accurate. Apple, for example, says it displays incident markers only when it has a high level of confidence in the reports it receives, so a new incident may take time to appear. Coverage also varies depending on how much information the apps receive. On less-traveled roads, fewer drivers may contribute location data, making it harder for apps to detect slowdowns in real time.
Arrival times are estimates, too. Google says its predictions combine historical patterns with live conditions, but it also notes that historical patterns aren’t always reliable indicators of what the road will look like. Conditions can also change unexpectedly because of events like snowstorms.
Map apps can help drivers avoid delays, but their estimates aren’t guaranteed. Drivers still need to followroad signs and pay attention to the conditions around them.
SOURCES
- Google, Google Maps 101, “
<li>Google Maps Help, “
