https://www.cnet.com/roadshow/news/toyota-hui-car-sharing-hawaii/

Toyota is launching a car-sharing service called Hui on the island of Oahu in Hawaii. The service, which is described as a complement to mobility offerings like bike rentals, public transportation and ride-sharing apps, lets people reserve and unlock a Toyota or Lexus vehicle via a smartphone app.

Hui essentially resembles existing car-share systems like the well-known Zipcar or General Motors' Maven. Cars are parked at specific reserved parking spaces, and members then use the Hui smartphone app to locate and reserve a car ahead of time. Using a technology that Toyota calls Smart Key Box, the smartphone then works as a key to unlock and start their rented vehicle all through the smartphone app.