Moving block systems are expected to lead to a smoother traffic flow and to a considerable reduction of train stops (or decelerations) along the track. The reason is very simple. In a fixed block system trains often have to stop because the track section ahead is not cleared yet, although the braking distance from the preceding train would allow to continue.

This effect is widely accepted. It is however very difficult to quantify. Quantification would require knowledge of

• the average number of stops along the track imposed by fixed block signalling
• the share of those stops being eliminated by moving block
• the average energy consumed per stop

Some experts warn, not to overestimate the effect of moving block on traffic fluidity and suggest to consider other measures as well, e.g. Optimisation of train operation by control center and demixing.