DennisOSRM/Project-OSRM — pull request #534 by philkingston (2012-12-11 10:34:23+00:00)
Title: Mini roundabouts and traffic calming penalties

I have been trying to get an accurate travel duration output from OSRM. I have noticed that various road items such as mini roundabouts and speed bumps don't get considered. These nodes can often affect the speed at which a vehicle travels and frequently influences a route. For example, a lot of people are deterred from using certain roads with speed bumps.

This branch makes the system consider mini roundabouts and traffic calming nodes when calculating a duration for a route. Each of the respective nodes have penalty scores added to the lua script. The code change is a very straightforward extension of the traffic light code.

What do you think? In my evaluation, it certainly seems to improve the accuracy of the route times.

Phil