After 8 to 12 days, on average, symptoms of measles can begin. The period between measles transmission and the start of symptoms is called the incubation period.
Pennsylvania traffic laws define the maximum speed that any motorist travelling on Pennsylvania roadways can legally drive. Driving over the Pennsylvania speed limit can result in a traffic citation, fine, license suspension, or even arrest. All urban areas have a blanket speed limit of 35mph in Pennsylvania. The speed limit for school zones is 15mph when students are coming to or from school, or whenever the speed limit beacon is flashing. There are a total of 16 states with higher maximum speed limits than Pennsylvania.
Quick, what do Texas and Washington have on common? They're the only two states that require coaches with vehicles in tow to observe a speed limit of 60 miles per hour [source: Hitch Me Up]. In general, many states set a speed limit of 65 for coaches with vehicles in tow; others set a limit of 55 mph. This is a good example of how towing regulations can change when you cross state lines, and why you should be aware that they often do.