Despite countless news reports about “Project Titan”, Apple’s top-secret self-driving car division, the tech firm didn’t admit that it was developing autonomous vehicle technology until 2017. Apple hasn’t discussed the matter much since then, but according to Bloomberg, the company is devoting plenty of resources to it:

Apple Inc. has expanded its California self-driving test fleet to 27 vehicles as it accelerates efforts to catch up with competitors such as Alphabet Inc’s Waymo.

Since receiving a permit to test three autonomous cars in California last April, the iPhone maker has registered 24 more Lexus RX450h sport-utility vehicles, the California Department of Motor Vehicles said in an emailed response to questions. The iPhone maker’s initial registration involved Lexus SUVs leased from Hertz Global Holdings Inc.

Given Apple’s history, it’s probably not going to blab much about Project Titan’s work until the software is ready for the public (or at least pilot programs). Stay tuned