Here is a ride on the Gdynia(Poland) Trolleybus line 20. It has 20 stops and goes from the Gdynia central train station to Cisowa SKM. But wait...the interior looks very familiar... I used almost the same frame and doors from my previous project. I rode one of these trolleybuses and they're totally AWESOME! The most trolleybuses in Gdynia are Solaris Trollino 12s (2nd, 3rd and the latest: 4th generation.)
Credit to @Controlified for the door sound. Sprites, voice and motor sound recorded and created by me. Start the project between 7pm and 8am and see what happens =) *I sadly don't have the original voice, so I used a speech synthesis software.