The ministry asked for alternatives, and two bridge proposals were but forward in 2013. The one involves the original crossing via Håøya, estimated to cost NOK 7 billion. Of this, NOK 5 billion would be for the bridges and would have a total length of . The second involves a suspension bridge to be built further south in Drøbaksundet, from Vestby, estimated to cost NOK 10 billion. It would have a main span of between and demand of new road. The latter bridge allows for a railway to be carried as well.