Title : Highways for a circular city

Given a circular city C, what is the best way to build a highway H of given length l,
to minimize the maximum travel time between any two points of C, if we assume that 
traveling on the highway is instantaneous, so that travel time is only the distance
not travelled by the highway.

Participants : Peter, Xavier, Naoki, Hyeon-Suk, Otfried, Mi Ra, Hee-Kap