1. Energy, Transportation, and Environment Department, Deutsches Institut für Wirtschaftsforschung, 10108 Berlin, Germany.
2. Technische Universität Berlin, Mohrenstrasse 58, Berlin 10117, Germany.
3. Department of Transport Engineering and Logistics, Pontificia Universidad Católica de Chile, Avida Vicuña Mackena 4860, Macul, Santiago de Chile 7820436, Chile.