The most important factors for public transport usage is reliability (it comes on time) speed and frequency(under 5-10 min wait time depending on area). For high demand areas- trams, for lower demand - trolleys or busses.
To achieve reliability speed and frequency transport needs own lanes and semaphore priority. If there are too few lanes - make one lane dedicated to pub transport and another - single direction for cars. Voila. You can start at worst with 15-20 min wait time, but reliable, and increase nr or units where demand is higher up to using a tram
Everything else has secondary priority. Even the mentioned safety aspect - it'll matter much less if the next bus will come in 5-10 mins and you can skip the current one because of some drunk ppl.
To achieve reliability speed and frequency transport needs own lanes and semaphore priority. If there are too few lanes - make one lane dedicated to pub transport and another - single direction for cars. Voila. You can start at worst with 15-20 min wait time, but reliable, and increase nr or units where demand is higher up to using a tram
Everything else has secondary priority. Even the mentioned safety aspect - it'll matter much less if the next bus will come in 5-10 mins and you can skip the current one because of some drunk ppl.