1. 2) Reports of Minster of Egyptian Transportation about road traffic in Greater Cairo, Al-Ahram Newspaper (Egyptian Newspaper), 1, 18, 2001 and 6, 28, 2001 (2001).
2. 3) S. Ali and A. Tamura, “Road traffic & traffic noise problems in Greater Cairo, Egypt: Characteristics, countermeasure taken and future plans,” Proc, 17th Int. Congr. Acoustics (2001).
3. 4) S. Ali and A. Tamura, “Road traffic noise problems in Greater Cairo, Egypt and future mitigation measures policies,” Proc. noise-con, 2001 (2001).
4. 5) A. G. Sayed, “Number of vehicles in Greater Cairo’s roads with using GPS,” Newspaper of Vehicles (Egyptian Newspaper), Aug. 2002 (2002).