The one in the top right corner says "Pyramids Street" (you can notice the pyramid shape there), moving down you will find the second sign saying by the end of the bridge, then the following one says same street, then the fourth one down says next U-turn, and the one at the bottom says from Faissal to Boulack. The first one on top of the left column has different meanings depending on where you are, so if in Faissal it says Tahrir, while if anywhere else it says straight forward or down the same street.
필자의 경우 캘리포니아대학 샌디에고 캠퍼스 (UC San Diego)의 인지과학부 학생들이 쓴 블로그 포스팅을 보기 전까지는 차 경적을 이용한 의사소통이 오직 이집트에만 있는 줄 알았다.