NationStates

Limits vary regionally according to general geography and are ultimately subject to the local government, but the federal general speed limits are as follow:

Motorways: Unlimited
National Primary roads: 80 km/h
National Secondary roads: 75 km/h
Urban Primary roads: 50 km/h
Urban Secondary roads: 40 km/h
Rural roads: 60 km/h

Urban main roads: 60 km/h
Urban local roads: 40-50 km/h
School zones: 30 km/h
Suburban main roads: 70 km/h
Suburban local roads: 40-50 km/h
Rural roads: 80-90 km/h
Urban highways: 80-90 km/h
Highways outside urban areas: Varies by state/territory.
State of Tasmania - 90 km/h
State of Victoria - 100 km/h
State of West Victoria - 110 km/h
Territory of South New Zealand - 90 km/h
Southeastern Australian Capital Territory - 100 km/h

Speed limits are enforced by local governments and police, though on the highway, you better be prepared to show some excessive g-force.

Speed limits in Alyska are determined by the following rules of thumb:

120 kph Rural controlled access divided highways
110 kph Other rural divided highways and controlled access divided highways on the periphery of urban areas
100 kph Undivided rural highways and controlled access divided highways in urban areas
90 kph Rural secondary roads
60-80 kph Major traffic arteries in urban areas
50 kph Commercial streets
40 kph Residential streets
30 kph School zones

Actual speed limits may vary depending upon local conditions and characteristics, but in general do not exceed these guidelines.

On the big motorways, none on two of the lanes and 75mph on the others. In towns, 30 mph. Right next to schools for short stretches of road, only 15 mph, but only when children are coming to/going from school.

The speed limit on most city streets and rural two-lane roads is 60–80 km/h, but the limit on expressways managed by the Korea Expressway Corporation ranges between 100 km/h and 120 km/h. Four-lane roads between cities generally have an 80 km/h limit.
There is a tolerance of 10 km/h over the posted limit and reduced fines for exceeding the limit by 10-20km/h.

Though cars, for the most part, are banned in East Equestria (owning one requires a massive amount of paperwork and is generally reserved for Party members), East Equestria has a massive and modern highway network spanning the country.

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No speed limits.

Average speed is somewhere around 7mph.

Urban main roads: 125 km/h
Urban local roads: 125 km/h
Suburban main roads: 55 km/h
Suburban local roads: 35 km/h
School Zones: 25 km/h
Rural roads: 100 km/h
Highway: No Speed Limit

Highway: 100-120 km/h
Expressway: 100 km/h
Major road: 70-100 km/h
Minor road: 40-70 km/h
Even smaller road: <40 km/h

Typical Yannian Speed Limits:
(Sub)Urban roads: 12 meyl (40 km/h - 25 mph)
Rural roads: 24 meyl (80 km/h - 50 mph)
Freeways/Motorways: 36 meyl (120 km/h - 75 mph)

In the same area, roads with more than 1 lane in either direction will typically have a speed limit
6 meyl ( 20 km/h - 12½ mph) higher than roads only 1 lane in either direction.
Freeways/Motorways always have at least 2 lanes in either direction, and are grade seperated.

Urban main roads: 40MPH
Urban local roads: 45 MPH
Suburban main roads: 45 MPH
Suburban local roads: 50 MPH
Rural roads: 60 MPH
Urban highways: 70 MPH
Highways outside urban areas: 100 MPH

The National Freeway has a speed limit of 430km/h
The freeways have a speed limit of 150km/h
Highways have speed limits of 130km/h
Country roads have a speed limit of 90km/h
Suburban/town roads have a limit of 80km/h
Urban roads are 60km/h

Highways: Unlimited
Main roads (non-highway): 100 kmh (62 mph)
Smaller country roads: 60/80 kmh (37/49 mph)
Urban areas: 50 kmh (31 mph)
Cities: 40 kmh (24 mph)
Some small roads: 30 kmh. (18 mph)

In this nation, you go fast or you don't go at all.

1 Lane Urban Roads: 60 kph
2 Lane Urban Roads: 80kph
Urban Expressways: 120kph
National Highways: No limit
Rural Roads: 80 kph

Cars are very uncommon in Yulis but are more common in rural areas, these are a general guide to speed limits
Urban main roads: 20 km/h
Urban local roads: 20 km/h
Suburban main roads: 40 km/h
Suburban local roads: 40 km/h
Rural roads: 60 km/h
Urban highways: 100 km/h
Highways outside urban areas: 120 km/h
Highest speed limit: 125 km/h (Guare State)

Residential Roads: 30mph
Non-Residential Roads: 40mph
National Speed Limit (single carriageways): 60mph
National Speed Limit (dual carriageways): 70mph
National Speed Limit (motorways): 70mph

Residential Roads: 30 km/ph
Non Residential Roads: 50 km/ph
Highways: 250 km/ph
Motorways: Unlimited
Rural Roads: 15 km/ph

Roads in Freedenea are all limited to a maximum of 85 km/h. However, it should be noted that cars are only common in major cities and even then, most citizens cannot afford them.

Urban main roads: 40 MPH/65 kph
Urban local roads: 25 MPH/40 kph
Suburban main roads: 40 MPH/65 kph
Suburban local roads: 25 MPH/40 kph
Rural roads: 50 MPH/80 kph
Urban highways: 55 MPH/88 kph
Highways outside urban areas: 70 MPH/110 kph
Outzone Roads: Unlimted

The general speed limit in the bayan is 60 km/h as its minimum and 100 km/h is maximum, although 120 km/h is still allowed. Speed limits may often vary in some places where the landscape or the shape of the roads grow very erratic to prevent accidents caused by speeding in blind curves.

Being caught breaking speed limit would mean the driver going to detention centers under the KK who install speed checking columns on the streets where significant speed limits had been installed. Breaking the simple speed limit often ends up in highspeed chases with police cars and KK Dangan airships or choppers.

Cars
Motorways: No speed limit, unless specified by road signage. It is illegal to pass a police or Highways Agency vehicle showing flashing blue, amber, or red lights on the motorway.
A-Roads (dual carriageways): 110 kph
B-Roads (single carriageways): 80 kph
C-Roads (city streets): 45 kph

Cars towing caravans or trailers
Motorways: 100 kph
A-Roads (dual carriageways): 100 kph
B-Roads (single carriageways): 65 kph
C-Roads (city streets): 45 kph

Buses and coaches
Motorways: 130 kph
A-Roads (dual carriageways): 110 kph
B-Roads (single carriageways): 80 kph
C-Roads (city streets): 45 kph

Goods Vehicles (less than 7.5 tonnes)
Motorways: 130 kph (100 kph if articulated or towing a trailer)
A-Roads (dual carriageways): 110 kph (100 kph if articulated or towing a trailer)
B-Roads (single carriageways): 80 kph (65 kph if articulated or towing a trailer)
C-Roads (city streets): 45 kph

Heavy Goods Vehicles (more than 7.5 tonnes)
Motorways: 100 kph
A-Roads (dual carriageways): 100 kph
B-Roads (single carriageways): 80 kph
C-Roads (city streets): 45 kph

These speed limits apply unless signs on the road indicate other speed limits. Signs will never indicate a speed limit higher than the speed limits given above. The speed limit on the road for any class of vehicle is either the National Speed Limit or the new limit given on the sign, whichever is lower (e.g. if a sign on a motorway indicates a new maximum speed limit of 130 kph, then cars will have to limit their speed to 130 kph while HGVs will still travel at a maximum of 100 kph).

Speed limits are enforced through the use of speed cameras and police patrols. Automated average speed cameras take pictures of cars which are found, through the use of two separate speed sensors, to be travelling at a speed higher than the speed limit. Their number plates are read and speeding tickets are sent to the owner's address.

Though there is no general nationwide minimum speed limit (signs may establish a minimum speed in a certain area), police may pull over any vehicle they feel is travelling slow enough to present a danger to other road users or to present an obstruction of the highway (Dangerous Driving and Obstructing a Road or Highway are both criminal offences).

There are no speed limits, but cars are not for civilian or party use, cars are only used by the police and military.

Speed limit varies but generally tends to be 65 kph in most regions of cities and towns, 50 kph in alleys, 35 kph in all unpaved roads, 100 kph in urban highways, 130 kph in rural highways