Posted road speed is just a suggestion anyway.

I ride to work on Fallowfield and Prince of Wales, they are just regular roads through the country-side, but they have an 80km/h limit. The funny thing is that traffic MAYBE moves at 10km/h ... I pass probably close to 1000 cars on the way to work.

When I ride home late and the traffic is moving, when a truck goes by at 80-100, you can really feel it.. thank god for the wide shoulder!