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.
Driving Laws In Greater Philadelphia. The maximum speed limit in Pennsylvania is 55 miles per hour unless posted otherwise. The maximum speed limit on interstate highways is posted after each interchange; on other highways the maximum speed limit is posted at approximately half-mile intervals.
The Law. It is the driver's responsibility to be aware of the posted speed limit. The maximum speed limit is 65 miles per hour on rural interstates, 55 miles per hour on interstate highways near or in major cities and on other highways, and 30 miles per hour in an urban area unless some other speed restriction is established.