According to the (unmodded) code there are 3 speeds when people are walking:
float _slowSpeed = 0.75; float _fastSpeed = 1.2; float _fastestSpeed = 1.4;
Slowspeed is walking on normal grassy ground, fastspeed is walking on a dirt road and fastestspeed is walking on a stone road
You can only have the 3 speeds, so in CC, brick road is the same speed as stone road.
In CC, we did bump up the road speeds a little bit:
float _slowSpeed = 0.75; float _fastSpeed = 1.4; float _fastestSpeed = 2.0;
In CC, any road you can build for free is FastSpeed and any road that costs stone, brick or something else to build is FastestSpeed.