With 55 self-driving cars and 83 drivers, Apple now has the second highest number of self-driving cars in the US state of California where autonomous vehicles are being tested.
The Cupertino-based tech giant had 45 self-driving cars until late March.
"Apple has the second highest number of self-driving cars after General Motor's Cruise, which has 104 vehicles as of now," MacReports reported late on Monday, citing the California Department of Motor Vehicles (DMV) as the source of the information.
"Apple grew from 3 to 45 between April 2017 and March 2018 and now this number has increased to 55," the report added.
Currently, the California DMV has provided permits to 53 companies for self-driving cars that include safety drivers, resulting in a total of 409 vehicles and 1,573 safety drivers in the US.
As of now, the DMV has not issued any permits for complete driverless testing because for that to happen, companies must have to have a pre-testing of the vehicles in controlled conditions.
"The DMV is currently reviewing two driverless testing permit applications," a DMV spokesperson told TechCrunch.
Said to be codenamed Project Titan, Apple's self-driving programme's fleet is reportedly made up of Lexus RX450h SUVs, each of which is fitted with huge racks of LIDAR and radar sensors as well as cameras.