Setting up a cycle lane in place is cheap, but not easy (at least in North America, people will always complain about the "war on cars").
Also, setting up a good cycle lane can be more expensive than you think. If you have a nice bike lane that spreads over 5 km but there's a 200 meters gap in it because of a bridge which was too narrow to keep the bike path, then you don't have a nice lane at all.
Also, setting up a good cycle lane can be more expensive than you think. If you have a nice bike lane that spreads over 5 km but there's a 200 meters gap in it because of a bridge which was too narrow to keep the bike path, then you don't have a nice lane at all.