11.5.4. The exit side of the road used by all traffic should be signed with “no entry” signs in accordance with 4.9.5 to 4.9.9. In this case, the “no entry” signs to diagram 616, including the sign placed on the traffic island, do not have supplementary plates. It is for the traffic authority to consider whether one or two “no entry” signs should be provided. A sign to diagram 955 (S3‑2‑28, see Figure 11-11), with a diameter of 450 mm, should be provided on the left hand side of the road at the entrance to the contraflow cycle lane. A second, smaller sign may be provided in a bollard on the traffic island. In some locations (e.g. in a traffic calmed area), it might be appropriate to reduce the size of the sign on the left hand side to 300 mm diameter or to remove it altogether, with the sign on the bollard being sufficient. In this case the cycle symbol road marking to diagram 1057 (see Figure 11-1), usually 1100 mm wide, together with the ahead arrow to diagram 1059 (S11‑4‑32, see 11.13.3 and Figure 11-30), should be placed on the carriageway at the start of the contraflow lane to clearly identify the route for cyclists. It is recommended that these markings are also provided where the sign to diagram 955 is used on the left hand side as shown in Figure 11-10.