Chance (0..1) that a branch is actually grown on each side.
Distance between side-road branches, metres (minor roads use the district's blockSize).
Growth delay for new roads of this class (lower = grown earlier, so it wins contested ground).
Length of one growth step, metres (shorter = smoother curves).
Sidewalk width on each side, metres (0 = none).
Chance (0..1) that a road carries on through a junction it runs into, instead of ending there.
Carriageway width, metres.
Size and growth rules of one road class.