20 in particular roads which no one respects, not even the transit police.
30 on roads with a bine lane
40 on roads
60/70 on avenues and twolane roads
80 on routes (everyone goes 120 anyways)
100 on highways in the capital
140 on highways
Highways have discriminated speed limits. Minimum is usually 50/60 and max from left to right 140 120 100 80.
130 appears sometimes. Not usually though.
Your speed limits vary much more than here where I live. Around here they run from 15 (very rare) to 70mph (24-112km/h).
15 to 25 is basically just for badly paved unmarked roads generally surrounded by people and parking lots.
30 to 35 is generally used for busy two lane (and usually narrow) roads in the middle of towns. These limits are the most enforced by the police.
40 to 45 is mainly used for routes or larger roads passing through towns. They usually have a lot of stoplights.
50 to 55 is mainly used for winding routes away from ample civilization. They usually have recommended curve signs but the speed you go is mainly up to your discretion.
60 to 70 is used for highways and interstates. 60mph roads are the highest speeds that have stoplights. Anything higher is just open highway.