The exit from the Karaoğlanoğlu roundabout into Alsancak westbound traffic appears structurally simple. The carriageway widens. Forward visibility is clear. There is no immediate hard curve.

Yet within the first seconds after exit, lateral instability increases.

Inside the roundabout, lane position is controlled by circular geometry. Vehicles hold curvature. Steering input is continuous. Once the vehicle exits toward Alsancak Coastal Road, the steering straightens abruptly and drivers instinctively reposition within the lane.

This is where the delay begins.

Westbound drivers often re-evaluate their downstream intention only after leaving the circular flow. Some intend to remain through-traffic. Others anticipate early right-side commercial entry. A smaller portion prepares for overtaking slower vehicles that exited conservatively.

Instead of committing to lane alignment before exit, repositioning happens 30 to 120 meters afterward.

Time pattern: 17:00–19:00 weekdays, 11:30–13:30 Saturdays.

During these hours, traffic density is sufficient to create short following distances, but not high enough to force rigid discipline. Vehicles leave the roundabout in sequence, then begin subtle lateral drift within the westbound corridor.

A common local scenario unfolds just past the exit alignment:

Vehicle A exits and holds central lane position.
Vehicle B exits behind and slightly left-biased, anticipating a smoother forward path.
Within 70 meters, Vehicle A signals late for a right-side retail approach.
Vehicle B, already edging left for perceived continuity, must adjust again.

The conflict is not aggressive overtaking. It is late intention crystallization.

Alsancak differs from Karaoğlanoğlu in that commercial access points begin earlier and occur more frequently. Drivers who delay lane commitment after circular flow encounter faster density compression.

Historically, before intensified retail development along the Alsancak strip in the late 2000s and early 2010s, westbound traffic after the roundabout behaved more like a continuation corridor. Lane shifts were less consequential. Entry frequency was lower. Today, every minor lateral movement has a higher probability of intersecting with turning intent.

Evening lighting contributes subtly. Shop signage activates, drawing visual attention rightward. Drivers glance toward illuminated facades while simultaneously adjusting lateral position. This reduces precision in steering stability.

The structural seam is narrow:

Circular confinement
Exit straightening
Delayed intention
Lateral correction under density

The road itself is not complex.
The behavioral recalibration is.

Alsancak westbound does not tolerate hesitation in lane identity immediately after the roundabout. When alignment decisions are postponed by even a few seconds, micro-corrections multiply.

And in a corridor where access points begin almost immediately, those micro-corrections create compression.