Do ask for help when crossing busy streets. Unless you’re very confident, in such situations wait for someone to cross with you, or ask someone to help you. Most Egyptians will be happy to oblige. This doesn't apply for all streets, of course, but in cities like Cairo and Alexandria where traffic is congested and traffic signs may be hard to locate, cars won't stop to let you cross, and you have to find a way between them. To foreigners, Egyptian drivers are suicidal. To Egyptians, leaving more than a few centimetres between cars is wasted space.