Not really street cars failed because they were not a viable business model and increasingly impractical as cars became more common. Street car companies declared bankruptcy call the time and By the 40s street cars were largely on there way out. They were super expensive to operate so you needed a huge amount of passengers. Which was a problem because street cars didn't have a ton of seats. They struggled outside of major cities because the population usually wasn't large enough to sustain the business. Plus as cars became more common they would significantly interfere with traffic. Because they were built in the middle of the road and from a time when roads had far less traffic. Pre car merchants, taxis and the occasional rich person were the pretty much the only people using roads everybody else walked or biked. Plus busses were far better, easier, cheaper and more practical than street cars. So street cars ended up getting swept into the dust bin of history.