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.
Report Abuse. I've driven it a few times, and it takes about 16 hours because the speed limit in Pennsylvania is 55, and enforced. Pennsylvania is roughly 50% of the trip. Can't seem to make it much faster than that without being reckless.