Saturday, October 31, 2020

Google Maps using DeepMind AI to predict your arrival time

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San Francisco: As people traverse over 1 billion km with help from Google Maps in more than 220 countries, the company is using artificial intelligence (AI) machine learning (ML) models to predict whether the traffic along your route is heavy or light, an estimated travel time, and the estimated time of arrival (ETA).

Google has partnered with DeepMind, an Alphabet AI research lab, to improve the accuracy of its traffic prediction capabilities.

“Our ETA predictions already have a very high accuracy bar – in fact, we see that our predictions have been consistently accurate for over 97 per cent of trips,” said Johann Lau, Product Manager, Google Maps.

By partnering with DeepMind, Google has been able to cut the percentage of inaccurate ETAs even further by using an ML architecture known as Graph Neural Networks.

“This technique is what enables Google Maps to better predict whether or not you’ll be affected by a slowdown that may not have even started yet,” Lau said in a statement on Thursday.

To predict what traffic will look like shortly, Google Maps analyzes historical traffic patterns for roads over time.

“We then combine this database of historical traffic patterns with live traffic conditions, using machine learning to generate predictions based on both sets of data,” Lau said.

Since the start of the COVID-19 pandemic, traffic patterns around the globe have shifted dramatically.

“We saw up to a 50 per cent decrease in worldwide traffic when lockdowns started in early 2020,” Lau informed.

To account for this sudden change, Google has updated its models to become more agile — automatically prioritising historical traffic patterns from the last two to four weeks and deprioritising patterns from any time before that.

The predictive traffic models are also a key part of how Google Maps determines driving routes.

“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 some other factors, like road quality,” Google said.

Two other sources of information are important to making sure Google recommends the best routes — authoritative data from local governments and real-time feedback from users.

Authoritative data lets Google Maps know about speed limits, tolls, or if certain roads are restricted due to things like construction or COVID-19.

“And incident reports from drivers let Google Maps quickly show if a road or lane is closed, if there’s construction nearby, or if there’s a disabled vehicle or an object on the road,” Google added.

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