The incidents such as stealing are frequently happening on the bus.
... pay attention to grammar
The incidents such as stealing do frequently happen inside public buses.Even worse, its uncommon to hear the accidents of buses such as fire or crash.
... This idea is already said once. So, I don't find any value addition from this sentence.
Secondly, another measure to encourage the use of public transport is to increase the safety. The incidents such as stealing are frequently happen on the bus. Even worse, its uncommon to hear the accidents of buses such as fire or crash. However, the safety of public transport can be improved in some level by installing more live cameras and providing safety training to the bus or train drivers.
Tell how it can be improved and give examples for such situations.