best one I've seen is for splitters,

"I love Speedbumps"

Thinking of ordering one for myself when mines lowered and on some New Wheels

Instant Fail tbh

how about:-

They are called Speedbumps for a reason!

or

Too Slow? Too Bad!

or

If I looked as stupid as you i'd want to get out of sight quickly too!

or

If you had left early you wouldnt be stuck behind me!

or

Sumps + Bumps = Slick!

or

Quiet - Sleeping Policeman at work!

If I looked as stupid as you i'd want to get out of sight quickly too!

or

If you had left early you wouldnt be stuck behind me!

them two are the winners right there both original

i good at thinking shit up like this!

got this one off ebay

thread resurrection FTW lol

No so close - i don't know you

or

The closer you get, the slower i go

or

You flash, i brake

or

If you had left early you wouldnt be stuck behind me!

but i'd change it earlier and not early :)

I realy wanted one making for potholes, these suspension bits are getting expensive now

Speedbumps give me wood, so i enjoy the experience!

you can get pothole specific ones lol

http://cgi.ebay.co.uk/Potholes-Kill-Sticke...3#ht_1265wt_813

How about 'I grind sleeping policemen...'