Sweden and Denmark are considering a fixed link between Helsingør and Helsingborg, either a a road, railway or road-rail.
The link would cross The Øresund, a straight separating the two countries that is only 6.7km wide between the Danish city of Helsingør and the Swedish city of Helsingborg.
Investigations, likely to cost around €2.3 million including €1 million from the European Union, will start this month with a final report by 2020.