ExampleTownSwitches

Here you can find examples of town growth switches.

With those settings your towns should grow rapidly, however they will grow even faster when you put a station or bus stop in a town (and of course something will be visiting it).

I also advise turning on townbuildnoroads switch so you gain control towns growth.

Temperate Climate

tgractstationexist 127
tgractstations 255
tgractstationsweight 255
tgrfizzydrinksinoptim 30
tgrfizzydrinksinweight 30
tgrfoodinmin 20
tgrfoodinoptim 80
tgrfoodinweight 30
tgrgoodsinoptim 255
tgrgoodsinweight 255
tgrmailinoptim 255
tgrmailinweight 255
tgrmailoutweight 255
tgrpassinmax 65535
tgrpassinweight 255
tgrpassoutweight 255
tgrsweetsinoptim 20
tgrsweetsinweight 20
tgrtownsizebase 10
tgrtownsizefactor 15
tgrwaterinmin 80
tgrwaterinoptim 20
tgrwaterinweight 30
townbuildnoroads on
towngrowthlimit 128
towngrowthratemax 4800
towngrowthratemin 255
towngrowthratemode 2
townminpopulationdesert 60
townminpopulationsnow 90