The other changes in 2016 are mainly due to the transfer of tangible assets to assets held for sale (note 19) of € 76 million. Works and equipment under construction mainly consist of investments in trains and buildings.

Part of the rolling stock included as at the balance sheet date is part of the cross-border lease transactions that were concluded in the past. The book value of rolling stock financed by cross-border leases was €81 million at year-end 2016 (2015: €112 million).

For Eurofima loans that are not part of the cross-border lease finance arrangements, collateral has been provided in the form of pledges on rolling stock (see note 30). The book value for this is €10 million (2015: € 274 million). The decline of the pledge is due to the decrease of the Eurofima loans.

Impairment and reversals

As a result of developments in the lease portfolio of a station complex in the Netherlands, a review has been performed of the recoverable amount of this complex. The recoverable amount is set at € 78 million. This has resulted in an impairment loss of € 24 million.

The calculations that give rise to the impairments and their reversals are based on a weighted average post-tax discount rate that is between 5.5% and 7% (2015: between 5.5% and 7%).