In most cities and towns, the speed limit for residential neighborhoods is no more than 25 MPH. This is due to the fact that household pets and children are unattended.
Added section by JohnH:
Residential neigborhoods in Texas are most commonly posted at 30 MPH. However, it can be as high as 55 MPH.
It can (and does) vary by state. The most common is probably 25 MPH unless otherwise posted.
The average speed for most residential areas is 60km/h (37mph), in some areas it can be 40km/h (24mph). The average speed on the freeways/highways/motorways is between 120km/h (74mph) to 80km/h (50mph).
speed limit at uncontrolled intersections in Alberta is approx. 25 km/hrs because the roads are narrows and vehicles are parked on both sides.If your speed is more than 25 it is hard to identify the hazards.
you need to be a little more specific.
we have a limit of 75 in some states and no speed limit in some states out west
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Exceeding the maximum speed limit in Pennsylvania is 30+ mph over the speed limit. I was going 31 over the speed limit and received a ticket for $190.00. Depending on the area, the ticket could be more or less, but I wouldn't think it would be cheap.
Where? Be more specific!
That would depend on State, County or Municipal laws. More specific location would be helpful... Some towns I know have 30, 35, and 25 mph 'city limits' ... those are probably most common.
It is very important for everyone's safety to drive the speed limit posted. If a person is caught speeding they can pay $300 or more for 15+ over the limit. They can also lose their license.
not everywhere, but by default there is just a recommended speed (~80mph).
Probably you mean temperature, rather than heat. And the temperature is more related to a particle's ENERGY than to its SPEED. I believe the degrees of freedom also have something to do with it - something like, average kinetic energy per particle and degree of freedom. Anyway, even though more speed means more energy, larger particles will move more slowly for the same kinetic energy - and therefore they will be slower at the same temperature. Also, while the speed is limited to the speed of light, there is practically no limit to the kinetic energy a particle can have.
No, not as long you don't exceed the speed limit.