O-3 Highway Sağmalcılar Viaduct, a critical section for drivers in Istanbul, will be closed at night due to expansion joint renovation works in Edirne direction. This will involve the closure of all lanes on the viaduct for 15 days from 23:00 to 06:00 at night starting December 12, 2025. The project is being implemented as part of a citywide program of upgrading and retrofitting existing structures, with a focus on improving earthquake safety. During this time, a planned rerouting and attention to traffic rules is vital for drivers.
All lanes will be closed during the night: Priorities for the Driver
The closure of all lanes from midnight onwards brings about sudden increases in traffic congestion, especially in Istanbul. Drivers should identify alternative routes in advance and plan ahead to reach their destinations safely. Guidelines include safe distances, adherence to speed limits and immediate reaction to appropriate directional signs. In addition, advance notification for drivers during nighttime working hours and quick adaptation to unexpected closures are critical.
Alternative Routes for Drivers: Smart and Safe Options
There are several clear and safe alternative routes for drivers who want to cross the O-3 highway from Aksaray direction to Edirne direction. The following routes allow you to safely bypass the current closure on the viaduct:
- Departure from Kartaltepe – Yildirim – Kocatepe exit: This route allows you to head towards the TEM line or other main arteries via the inner city connections, regardless of the viaduct. Carefully follow the two-way flows to reduce traffic congestion during access.
- Re-joining the O-3 highway via Hal Junction: Hal Junction is a critical crossing point for the flow towards Edirne. From here, you can quickly get your direction by turning back to O-3.
- Then access to the TEM Highway connection: The connection to TEM minimizes delay for long-distance driving and provides flexibility for alternative flows. When using this route, pay attention to the shield signs and crossing points.
Traffic Signs and Road Route Management: Necessarily Applied Principles
During the duration of the works, traffic congestion for drivers is expected to increase. The following safety steps are therefore vital:
- Closely follow traffic signs and directional signs. Following the signs set by the authorities contributes to keeping the flow safe and orderly.
- Observe speed limits and maintain a safe following distance. Driving dynamics may change during nighttime working hours; leave enough distance in case of sudden stops or slowdowns.
- Plan alternative routes in advance. Determine your route in advance to optimize the driving flow with curb-cropped roads and comfortable phasing.
- Be careful when using connections with main arteries. In particular, the crossings at Hal Junction, Kartaltepe and Yıldırım may be critical for congestion management.
Practical Tips for Safe Travel
Renovation works at night require extra attention and preparation for drivers. Here are practical suggestions for a safe and smooth journey during this process:
- Check road conditions and closure times before setting off. Authoritative news sources and municipal announcements will include up-to-date closure plans.
- Keep your wayfinding devices and navigation apps up to date. Make sure alternative routes are available and heed warnings.
- Increase your visibility when driving at night. Make sure your headlights are working correctly and your response time is fast.
- Plan fuel and rest. Predetermining fuel status and stopover points on long and alternate routes increases safety.
Planned Changes and Authorized Disclosures
Expansion Joint Renewal works to be carried out on the O-3 Sağmalcılar Viaduct within the scope of the earthquake safety-oriented retrofitting project of the Istanbul Metropolitan Municipality are bringing the city’s transportation flow to a challenging period. Authorities are implementing night-time closures to minimize traffic flow and maximize safety during the works. This decision aims not only to increase the functionality of the viaduct, but also to optimize the flow balance across the city.
Comprehensive Tracking and Information: The Ultimate for Drivers’ Safety
Emerging infrastructure reinforcement projects necessitate the rerouting of urban traffic. Delays or temporary changes to routes require patience and attention from drivers. Authorities share instant notifications through information centers, and drivers can follow these resources to plan a safe and fast travel plan.
Contact and Support Channels
The official communication channels where road users can submit their problems and guidance requests during the Project are as follows:
- Municipality and Highways authorized contact numbers
- Current announcements on official websites
- Public information boards and mobile application notifications
In conclusion, the reinforcement works to be carried out on the Edirne side of the O-3 Sağmalcılar Viaduct aim to ensure a safe and robust infrastructure by closing traffic at night. Drivers should identify alternative routes in advance, pay attention to signs and guidance signs, and comply with speed and following distance are key steps for a safe journey.
