Robobus is a bus without a driver, autonomous at level 4. 

Some are still slow quite slow and used as shuttles on limited streets but in a few years they can offer a new, on demand public transportation. Then CabiBUS can offer a better transportation alternative than the private car for the daily trips resulting in a fast transition to sustainable mobility.

The word BUS usually refers to fixed line buses and public transit, while Taxi refers to door-to-door transportation.

Since CabiBUS  is a shared door-to-door service it could as well be called CabiTAXI, but since it mainly offers shared rides, as public transit, the name CabiBUS was selected.

https://www.helsinkismart.fi/portfolio-items/sohjoa/

Hop on the driverless SOHJOA robobus

https://www.automobilwoche.de/article/20180627/NACHRICHTEN/180629908/kooperation-von-zf-und-ego-robo-bus-startet--in-serie

Kooperation von ZF und eGO:
Robo-Bus startet 2019 in Serie

https://www.heise.de/select/ct/2018/10/1526008148939708

Robobus

Wo und wie autonome Busse jetzt schon fahren

https://www.innoz.de/de/robobus-wo-und-wie-autonome-busse-jetzt-schon-fahren

Robobus: Wo und wie autonome Busse jetzt schon fahren

https://vaaju.com/switzerland/20-minutes-we-took-the-robo-bus-into-the-future/

We took the robo bus into the future

https://www.sott.net/article/305182-Robo-bus-Driverless-buses-are-coming-to-America

Robo bus: Driverless buses are coming to America

https://www.salzburgresearch.at/en/2019/this-was-the-citizen-debate-on-automated-mobility-in-salzburg/

This was the Citizen Debate on Automated Mobility in Salzburg