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.
Definition of speed limit for English Language Learners. : the highest speed at which you are allowed to drive on a particular road. Spanish Central: Translation of speed limit Nglish: Translation of speed limit for Spanish speakers Britannica.com: Encyclopedia article about speed limit.