Very steep descent ahead not suitable for some vehicles signs
Purpose: These signs warn drivers that certain vehicles may not be able to drive down the steep descent on the road ahead safely. These vehicles may include:
Alternative route signs show which way these vehicles can go to avoid the steep descent and continue their journey.
Slow vehicle turnout signs
Purpose: These signs indicate that slow vehicles can use the turnout ahead on the left. A turnout is where the road widens for a short distance. Slow vehicles can use this area to allow other traffic to pass them. You will see turnouts on low speed roads where there is not enough space for an overtaking lane.
Slow vehicle lane ahead signs
Purpose: These signs show that there is a slow climb ahead and that slow vehicles must use the left lane. They may also tell you the distance to the start of the slow vehicle lane.