I'm curious, do you sometimes need to brake slightly before you pass through a curve or are the tracks designed so that you can go at full speed with no problems?
Of course i have to use the breaks in a curve.
Our rail (at the green line in Stockholm) has a digital safety system communicating with the train’s software which disallows me to exceed certain speeds - and forces me to slow down. If i disobey that - it will activate the emergency breaks after a couple of seconds and the train comes to a stop.
The speed limits vary across the Stockholm subway Green Line and its highly changing rail conditions (curvy, straight, outdoor, indoor, sections where the rails are worked on, etc.
But there are still manual signs with speed limits placed out - which i too have to obey and slow down the train manually.
In theory i can drive the drain on automatic (ATO) and it will slow down the train into the next station until stand still. But we don’t use it anymore. Why ? Well already many years ago, they realized that the ATO system consumed much more power
all the effort to implement and finetune that system - which took many years… for nothing.
But… this is “Stockholm subway clown authorities and companies” in a
nutshell. it has happened with many expensive aspects, systems, ideas, implementations etc - taking years and cost hundreds of millions SEK, and then… uhm… being discarded or unused. Over and over again. It is as if they never learn.
So.
Even with all the digital woodoo, a subway train can derail with a pair of wheels, despite speed restrictions. It has happened a few times in the past. Either because of something wonky happened with the train itself, or because of detrimental conditions in the rail itself.
now on #Línea3 running from #IndiosVerdes to #Universidad.
