This is a full height (1 metre) traffic cone, as worn by only the most stylish Glaswegian statues!
Dimensions are from UK 2011 legislation, rather than the paywalled BS EN standard. Details in the OpenSCAD source code.
THIS MODEL IS A FULL METRE TALL — YOU'RE GOING TO HAVE TO SCALE IT TO FIT YOUR PRINTER!
Included is a 3MF project file containing four cones scaled down to a much more reasonable 50 mm.
update 2019-01: minor change to OpenSCAD source to stop warnings.
For maximum authenticity:
start with black filament
at 5% height (or after the octagonal base), switch to red filament
at 35% height, switch to white filament
- at 75% height, switch back to red filament.
None of this is encoded in the STL.