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INVESTMENT PROPERTIES | 12 Months Ended
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Dec. 31, 2017
Investment property [abstract] |
INVESTMENT PROPERTIES | INVESTMENT PROPERTIES The following table presents the carrying amount for Brookfield Infrastructure’s investment properties:
US$ MILLIONS | 2017 |  | 2016
Balance at beginning of the year | $ | 154 |  |  | $ | 153 |
Additions, net of disposals | — |  |  | 3 |
Non-cash additions | — |  |  | 10 |
Fair value adjustments | 23 |  |  | 12 |
Foreign currency translation | 15 |  |  | (24 | )
Balance at end of the year | $ | 192 |  |  | $ | 154 |
For the year ended December 31, 2017, fair value adjustments of $23 million were recognized for the U.K. port operation (2016: $12 million). Investment properties are measured at fair value on a recurring basis and the effective date of revaluation is December 31, 2017 and 2016. The fair value of our partnership’s investment properties are determined by management of our partnership with due consideration given to other relevant market conditions. The following table summarizes the valuation techniques and significant inputs for Brookfield Infrastructure’s investment property. Our partnership has classified all assets below under level 3 of the fair value hierarchy:
Segment |  | Valuation technique |  | Significant unobservable inputs |  | Range of inputs
Transport |  | Direct Income Capitalization |  | Capitalization Rate |  | 6% to 14%
An increase in the capitalization rate would lead to a decrease in the fair value of investment property, with the opposite impact for a decrease in the capitalization rate.

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