The General Department of Studies and Designs, in cooperation with Kothi Engineering Consulting Company, implemented a workshop to discuss the study of improving and increasing the efficiency of the ventilation system in Suq Shaguir tunnel and discuss solutions and alternatives that the company reached to close the ventilation openings in the roof of this tunnel without affecting the ventilation systems and the fire extinguishing systems in the tunnel. The workshop was held in the presence of His Excellency the vice chairman of Holy Makkah Municipality / Ibrahim bin Ahmed Al-Ghamdi and the agent in charge of projects, Eng/ Issam bin Ali Tarimi And a number of relevant government agencies and specialists in the field