https://www.contractorcalculator.co.uk/what_is_ir35.aspx

http://www.tap.iht.org/

http://www.dft.gov.uk/trafficsignsimages/

https://www.gov.uk/working-drawings-for-traffic-signs

http://www.dft.gov.uk/traffic-auths/

https://www.gov.uk/government/publications/traffic-signs-manual

• Chapter 3: Regulatory Signs
• Chapter 4: Warning Signs
• Chapter 5: Road Markings
• Chapter 7: The Design of Traffic Signs
• Chapter 8: Signs for Road Works and Temporary Situations

https://www.gov.uk/government/publications/local-transport-notes

• 1/12 Shared Use Routes for Pedestrians and Cyclists
• 1/11 Shared Space
• 2/09 Pedestrian Guardrailing
• 1/09 Signal Controlled Roundabouts
• 2/08 Cycle Infrastructure Design
• 1/08 Traffic Management and Streetscape

https://www.gov.uk/government/collections/traffic-advisory-leaflets

Traffic Management Jobs & Training Guide