Karahisar Tunnel

Karahisar Tunnel is located on a transportation axis connecting Afyonkarahisar to İzmir, Antalya and Istanbul. Constructed along the Afyonkarahisar–İzmir highway, particularly in the area known as the Özdilek ramp, the tunnel is designed as a twin-tube, two-lane structure. Construction of the project began after 2016 and was completed within a short period, opening to traffic in 2017.

• Length: Each tube is 400 metres long; the total length including approach roads is 2.5 kilometres.
• Number of Lanes: Two-way, two-lane.
• Slope: The road gradient within the tunnel is 3%, with a maximum gradient of 5% on the approach roads.
• Distance Reduction: The tunnel has shortened the route by 910 metres.
• Construction Duration: The project was completed after approximately one year of work.
• Workforce: A total of 250 personnel participated in the construction.

• Improved Traffic Flow: To reduce traffic congestion, especially during winter months and holiday periods.
• Enhanced Driving Safety: The previous road had a 7% gradient, which posed difficulties for drivers. The new route, with a 5% gradient, offers safer driving conditions.
• Fuel Savings: Reduced distance and improved gradient have led to lower fuel consumption.
• Easier Snow Control: Significant relief has been achieved in snow removal operations during winter months.
• Reduced Maintenance Costs: The new road has minimized high maintenance expenses associated with the previous route.

Construction of the Karahisar Tunnel began in 2016 and was largely completed within approximately one year. The first tube was opened to traffic toward the end of July 2017. The second tube was planned to be completed by the end of August and brought into service with full capacity. It was announced that the tunnel became fully operational by the time of the Sacrifice holiday.

• Connection Points: It serves as a key transportation link to İzmir, Antalya and Istanbul.
• Access to Özdilek Junction: Thanks to the new road, travel time to Özdilek Junction has been reduced to approximately 3.5 minutes.
• Alternative Route Advantage: It provides drivers with an alternative route, easing the traffic load on existing roads.

The Karahisar Tunnel is regarded as a project that strengthens the regional transportation infrastructure. Its ability to accelerate traffic flow, enhance driving safety, and reduce maintenance costs reinforces its value for both drivers and the region economy. After its completion, a noticeable reduction in traffic congestion was observed, particularly during holiday and holiday periods.