25 MPH or as posted.
No, Limit line marks the crosswalk and the beginning of an intersection. If the light is red, you must stop before the first white line.
Firstly there is no flight line road - its taxiway, Apron or Landing Stip On the taxiway a pilot should not exceed a good walking pace. Therein no more than 25 mph. The apron is 5 to 10 mph due to the volume of traffic, and pedestrian users
The humps do not affect the speed limit. The speed limit is determined by other rules and signs.
the same speed
There isn't one set, standardized speed for this. The construction site speed limit will vary according to a number of factors, such as number of lanes open, original speed limit on the road, proximity of work crews and equipment to the road, etc.The speed limit is whatever is posted on temporary speed limit signs.Rule of thumb is half the posted speed limit.
Depends on who administers the road. If it's a private road, the speed limit will be whatever the owner of the road determines it to be. In most instances of gravel roads not being private roads, they'll typically be county roads, and the county will have the jurisdiction to determine the speed limit.
Europe does not have a universal speed limit. It is dependent on the country, the jurisdiction, and the road itself.
The safest maximum speed for that road
Speed limits are based on the road, not the driver. Thus, unless another limit is specified, such as for trucks over a certain weight, the same speed limit applies to all drivers on that road.
Whatever the normal posted speed limit of the road is.
Whatever the speed limit of the road you are driving on. There is no specific limit just for a railroad crossing.
All vehicles get the speed limit on the road, whether it is a motorcycle motorbike or whatever, it it is a vehicle it has a speed limit.