Availability of trains NS withdrew an overall average of 10% of the NS fleet for maintenance, repairs and upgrades on any given day in 2016 (2015: 13%). This means that we performed better than the norm of 12% per year and that we met the target that is needed for the timetable. This gain comes from building ‘pit stop’ lanes in all the maintenance centres during 2016. These ensure that the turnaround times during withdrawals become considerably shorter and trains are available for passengers again more quickly. The structural performance improvements applied to all trains: Sprinters, Intercity trains and international trains.