Picture this, mate!: What's gonna end?

Is it the end of the bicycle track as well as the people walking? Sounds like a no man's land!

Picture this, mate!: Road signs!?

I am starting a new photo blog series titled "Picture this, mate!" on my blog which essentially is a collection of interesting pictures I have clicked in Australia. So here goes the 1st one out to you:

How would you read this?
a) AHEAD HUMP
b) HUMP AHEAD