Chapter 3 of the Traffic Signs Manual sets out how to use regulatory signs, including those for bus lanes. The figure below is taken from the current (2019) edition:
The accompanying text explains:
9.3.3. The start of the lane is marked with a broken line to diagram 1010 (S11-4-10), the same width as the 1049A marking [250 or 300mm], and normally laid at a taper no sharper than 1:10. There may be situations where it is not practicable to provide a taper of 1:10 and a sharper taper is necessary. In such circumstances, care should be taken to ensure that traffic is directed away from the start of the bus lane in a safe manner… The bus lane should not start in such a position that the marking to diagram 1010 would extend across a side road junction. Deflection arrows to diagram 1014 (S11-4-14, see Chapter 5) 4.5 m in length should be placed 15 m and 30 m upstream of the start of any taper where general traffic is required to deflect but certain vehicles are not…
Apart from the changes to diagram numbers, the only change from 40 years before is that the deflection arrows are now to be placed 15m and 30m before the start of the taper rather than before the start of the bus lane.
The text explains:
9.4.2. A contraflow bus lane is effectively a one‑way road with a bus lane (or bus and cycle lane) running in the opposite direction.
The typical layout is:
Written 16th November 2025; last updated 17th November 2025