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 85 percent. The 85th percentile method sets the limit at the speed 85 percent of drivers travel â regardless of the currently posted limit. States that trust the 85th percentile as a valuable benchmark assume that most drivers are reasonable and safe and that it makes sense to base the limit on what they do.