Why are trains sometimes delayed?
Train delays can happen when things don’t quite go as planned. It might be due to bad weather, planned maintenance, or something unexpected. Here’s a friendly overview of the most common reasons trains get delayed — and what they actually mean.
Signal failure
In short, a signal failure means that the system has detected a fault. Trains rely on signals to show whether it’s safe to continue or if they need to stop. To avoid accidents, the train automatically gets a red light and has to wait until the fault is resolved.
Signal failures can happen for many reasons, such as electrical or technical issues, problems with switches, or faults in the tracks.
Weather conditions
Heavy rain, cold temperatures, and strong winds can all cause major delays or cancellations.
- Strong winds can blow trees onto the tracks, sometimes damaging the electrical system.
- Heavy rainfall increases the risk of flooding, mudslides, and rockslides, which can block or damage the tracks.
- Snow and ice can break windows, jam doors, and slow down maintenance, since the trains need extra time to thaw.
Railway maintenance
Railway maintenance is carried out by Bane NOR to keep the train network safe and efficient. Tracks, signals, and infrastructure need regular upgrades and repairs to prevent faults and increase capacity.
Maintenance can be planned, like scheduled upgrades, or unplanned, for example after accidents or storms.
Ground faults
A ground fault happens when electricity leaks and goes somewhere it shouldn’t — for example from a cable into the ground. When this happens on the railway, the power must be switched off for safety reasons, and trains can’t continue running until it’s fixed.
Sun kinks
When it gets very hot, the metal rails expand and buckle. This can cause the tracks to bend out of shape. Because sun kinks can lead to derailments, the affected section of track must be closed until repairs are made.
Technical issues with trains and equipment
Trains in Norway are exposed to demanding weather conditions, wear and tear, and daily operations. When a train needs repairs or maintenance, it can lead to delays or cancellations. If more trains than usual are out of service at the same time, there may be a shortage of rolling stock. This can result in some departures being cancelled or trains running with fewer carriages than normal.
Crowded trains
Crowded trains can also cause delays, especially during rush hours. When a lot of people need to get on and off at the same time, it takes longer at each station, which can delay the whole journey.
Knock-on delays
Knock-on delays happen when one delayed train affects other trains that share tracks or stations. For example, a delayed train might block the track, or other trains may have to wait for an oncoming train that’s running late.
Staff shortages
A staff shortage means that we do not have the right staff available in the right place at the right time. This may be caused by illness, delays, service disruptions, or the need to move staff between services. In addition, rules on working hours, rest periods, and the required certification for specific train types and routes must always be followed.