Compared with ordinary locomotives, electric locomotives have many advantages, the most important of which are low pollution and low noise.
After all, it's urban rail transit, and pollution and noise should be avoided as much as possible. This is also why rail transit in various countries would rather use horses as power than locomotives.
As early as last year, Germany's Siemens Company had corresponding electric tram rail technology. But at that time, the electric power shown by Siemens was too poor, with an average speed of only 13 km per hour and could only hold a few people, obviously not suitable for commercial use.
In the technology exchange between Germany and Spain, Spain obtained this immature rail transit technology. After improvements by Tesla and the Electricity Laboratory, the current tram power has been significantly enhanced, and the average speed has also increased to about 20 to 25 km.
