Our northern Australia correspondent (thanks, Viola) sent us these images of a cycle path in Darwin. There's a clear speed limit at work - for both cyclists and pedestrians.
Even though I don't have a cycle computer any more, following an unfortunate incident with a biplane in the west of Ireland last year, I know when I'm cycling less than 20pkh (a bit over 12mph in proper money), because my legs are moving.
But how do all these dangerous high-speed joggers keep tabs on their speed? And surely 20kph is getting on for world-record pace for long distance running? Are Darwin's residents that super-fit?
I didn't realise they were such a problem, but perhaps we should start a campaign of complaint against the Pedestrian Peril. They don't have insurance, they don't have licence plates, a friend of a friend told me she was NEARLY RUN DOWN by one the other day, they don't pay road tax...