As pointed out in screenshots provided by Android Police, this mode cuts off a few minutes off of shorter rides, and up to an hour off of longer ones. For users in India, though, soon to be followed by other countries, there is a fifth option: two-wheeler mode. It also provides customized traffic and arrival time estimations. First of all, you have to choose the new two-wheeler mode if you are riding a bike and searching for a destination in Maps. Voice-guided navigation like the vehicle mode has also been carried forward to the 2-wheeler mode. Similarly, there are highways where two wheelers are not allowed. "India is the largest two-wheeler market in the world, and the millions of motorcycle and scooter riders have different navigation needs than drivers of automobiles", said Caesar Sengupta, Vice President, Next Billion Users Team at Google. The two-wheeler mode shows those "shortcuts" routes that are not accessible to cars and trucks.
The motorcycle mode will supposedly make an appearance when you update to version 9.67.1 of Google Maps, but only if you're in India. A user can now estimate the time of arrival to the destination in a more accurate fashion. It also gives information about the parking scenario at their destination, a handy feature that was previously seen in the auto mode.
Anyone who has used a smartphone would know what Google Maps is. The accuracy and coverage it offers globally, is unmatched by other map guidance system.