There is a variety of Design Guides for Cycle Facilities available. Transport Scotland published Cycling by Design in 2010, and this is the guide that, according to Glasgow’s Strategic Plan for Cycling 2015 – 2025, Glasgow City Council refer to.
Sustrans published their guide, Handbook for Cycle-friendly Design in 2014.
Transport for London published London Cycling Design Standards in 2005, currently being updated.
We have been made aware of the US Federal Highways’ Separated Bike Lane Planning and Design Guide.
The Department of Transport publish The Traffic Signs Manual and Chapter 3, starting on page 146, covers Cycle Facilities.
The Highway Code and other useful documents are linked from our Cycling Links – yet more useful information page.