I wasn't able to complete the Public Transit journal entry despite having the strongest economy in the world (2B GDP) and plenty of motor industries. The problem is that you need to switch 75% of your machine industries to automobiles which drives down the price of cars and makes them unprofitable which means they can't accumulate cash reserves. Another issue is you need to switch your urban centers pms to public motor carriages which again because I have services already super cheap makes it impossible to keep urban centers profitable. I feel like this journal entry punishes you for building the biggest motor industry in the world. Also it's just complicated to do these journal entries when you need to balance needs and production methods across hundreds of motor industries and urban centers.