The primary reason for people choosing not to cycle, as found and cited in a 2001 TRL report, is that adults feel it too dangerous to cycle on the roads, as current legislation proposes is necessary. 62% of adults described feeling unsafe cycling on the roads.
What do the new cycling infrastructure design standards look like? – Cycling Industry News
Mark Sutton, 28 July, 2020; England and Northern Ireland finally have a first set of cycling infrastructure design standards, providing local authorities and planners with a reference point from which to build safe lanes.