What's the difference between Dalian Metro and Dalian Express Railway?

The main difference between the two is the different weight. The weight of subway is much higher than that of express rail. Weight is a very important factor for the stability of train operation. But in order to enhance their stability, designers have thought of many ways to increase their weight, thus improving their stability and making people's travel more convenient.

There is also a very important factor that distinguishes them, and that is passenger capacity. The subway can carry a lot of people, about 30,000-60,000 passengers per trip, while the fast track is less, about1-30,000. Their plane curve lengths are also different. The former is not less than 300m, and the latter is generally between 100m-200m.