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| Highway 40 (Saudi Arabia) | |
|---|---|
| Country | SAU |
| Type | Highway |
| Route | 40 |
| Length km | 812 |
| Direction a | West |
| Terminus a | Jeddah |
| Direction b | East |
| Terminus b | Dhahran |
| Cities | Mecca, Ta'if, Riyadh, Hofuf, Dammam |
Highway 40 (Saudi Arabia) Highway 40 is a principal east–west arterial road traversing the Hejaz, Najd, and Eastern Province of the Kingdom of Saudi Arabia. The route connects the Red Sea port city of Jeddah with the oil hub of Dhahran, passing through major urban centers such as Mecca, Ta'if, Riyadh, and Hofuf. As part of Saudi Arabia's national transport network, the highway links with international corridors and regional infrastructure projects, serving passenger, freight, and energy-sector traffic.
Highway 40 begins near the Jeddah Islamic Port area and proceeds inland toward Mecca and Ta'if, skirting the Sarawat Mountains before descending into the Najd plateau toward Riyadh. From Riyadh the alignment continues eastward across the Ad-Dahna Desert and the Rub' al Khali periphery to the Eastern Province, terminating near Dammam and Dhahran. Along its length the road intersects with arterial links to Makkah Royal Clock Tower, King Khalid International Airport, King Fahd International Airport, and industrial zones such as the Second Industrial City in Dammam. The alignment crosses varied terrain including coastal plain, mountainous escarpment, and sand desert, requiring connections to regional roads like Highway 5, Highway 65, and Highway 95.
The corridor originated from traditional caravan routes between the Red Sea ports and the Persian Gulf during the Ottoman Empire era and later the Hashemite period. Modern construction accelerated after the discovery of oil in Dammam Field and the founding of the Petroleum Development (PDPC) era, with major upgrades during the Saudi Vision 2030 planning horizon. Post-World War II investments and bilateral agreements with contractors from United States, United Kingdom, and France firms supported paving, with later expansions influenced by projects like the Ghawar Field logistics demands and pilgrimage traffic to Hajj sites. The route has seen successive widening programs coordinated by the Ministry of Transport and integrated with initiatives by Saudi Aramco and the Public Investment Fund.
Key interchanges include the western approach where links connect to the Jeddah Corniche, junctions providing access to Mecca via the Jeddah–Makkah Highway, the Ta'if ring road, and the radial network feeding Riyadh such as the Riyadh–Jeddah Highway interchange. In the capital region the highway intersects with beltways serving King Abdullah Financial District, Olaya District, and the Diplomatic Quarter. East of Riyadh principal nodes serve the Hofuf industrial area, connections to Khobar waterfront, and the Dammam–Dhahran–Al Hasa complex. Interchanges are designed to meet demands from freight terminals like the Jubail Industrial City linkage and service roads to facilities such as King Abdulaziz Port.
Traffic composition includes long-haul freight linking Jeddah Islamic Port to eastern export terminals, commuter flows to Riyadh and intercity passenger trips during Eid al-Fitr and Hajj seasons, and dedicated logistics for Saudi Aramco operations. Peak seasonal surges correspond with pilgrim movements to Mecca and workforce shifts related to construction cycles in Neom and other development projects. Traffic management integrates enforcement from the Public Security traffic police, electronic toll systems piloted in line with National Transformation Program objectives, and coordination with air transport hubs like King Abdulaziz International Airport and King Fahd International Airport.
Design standards reflect high-capacity multi-lane carriageways, controlled-access segments, and at-grade sections near urban perimeters. Pavement structure accounts for high temperatures and sand encroachment, employing materials tested by institutions such as King Fahd University of Petroleum and Minerals and standards set with input from Saudi Standards, Metrology and Quality Organization. Supporting infrastructure includes rest areas, fuel stations operated by companies like Saudi Aramco, service plazas, bridges over wadis, drainage systems adapted to flash flood events, and ITS deployments aligned with Saudi Ministry of Communications and Information Technology frameworks. Recent upgrades introduced concrete barriers, LED lighting, and geometric improvements near mountainous sections to meet international codes influenced by American Association of State Highway and Transportation Officials consultants.
Safety records show incidents involving heavy vehicles, head-on collisions on undivided stretches, and weather-related crashes during rare rains causing wadi flooding. Notable emergency responses have involved coordination between General Directorate of Civil Defense, Saudi Red Crescent Authority, and regional hospitals such as King Faisal Specialist Hospital during multi-vehicle collisions. Enforcement measures include speed cameras, heavy-vehicle restrictions near urban centers, and campaigns by Traffic Department and Ministry of Health on road safety. Infrastructure mitigations have reduced accident rates on upgraded segments, though remote stretches still present risks from driver fatigue and inadequate services.
Highway 40 is integral to Saudi Arabia's logistics chain, enabling inland distribution from Jeddah Islamic Port to eastern export facilities and connecting petrochemical complexes in Jubail and Hofuf with markets in GCC states. The corridor supports pilgrimage economies tied to Mecca and Medina access via feeder routes, underpins workforce mobility for projects like Riyadh Metro construction, and serves as a strategic conduit for energy-sector operations centered on Dhahran and Ghawar Field. As part of broader regional initiatives, the highway facilitates trade under frameworks involving the GCC and links to proposed transcontinental routes envisioned in Vision 2030 diversification plans.
Category:Roads in Saudi Arabia Category:Transport in Riyadh Category:Transport in Jeddah Category:Transport in Dammam