Alsancak differs from Karaoğlanoğlu in one structural way: inland discharge is stronger and steeper. Residential streets rise quickly toward the hillside and descend sharply back to the coastal axis.

The miscalculation forms on the downhill approach.

Time pattern: 17:00–19:30 weekdays. Secondary window: 21:00–23:00 during evening social return.

Vehicles exiting upper residential streets toward the Alsancak Coastal Road often descend at controlled but increasing speed. Gravity adds silent acceleration. Brake modulation feels lighter than expected. By the time the vehicle reaches the junction line, approach velocity is slightly higher than perceived.

At the same time, westbound and eastbound coastal flow continues at stabilized corridor rhythm.

A typical local sequence unfolds:

Vehicle A descends from a steep inland connector toward the main axis.
Driver checks right and left, estimating coastal gap timing.
Because descent speed was underestimated, the vehicle reaches the merge point earlier than mentally projected.
The driver either brakes abruptly at the junction line or commits into a narrower gap than originally calculated.

Two compression outcomes occur:

Abrupt stop at the junction creates rear risk from another descending vehicle.
Committed merge creates lateral tension with approaching coastal traffic.

Unlike flat residential exits, steep connectors shorten the decision window. The vehicle’s arrival time at the junction is compressed by downhill momentum. Even a minor miscalculation of 5 to 8 km/h alters gap timing significantly.

Historically, as apartment clusters expanded uphill through the 2010s and 2020s, inland-to-coastal discharge frequency increased. Road geometry remained steep. Traffic volume intensified.

Evening conditions add subtle distortion. Headlight glare from the coastal axis reduces depth perception for descending drivers. Conversely, vehicles on the main road may not immediately register a fast-approaching downhill vehicle due to elevation difference.

The structural seam is clear:

Steep descent
Underestimated approach speed
Gap timing decision at junction
Immediate merge into active coastal rhythm

The risk is not excessive speed. It is arrival-time misjudgment caused by gradient.

Alsancak Inland Connectors do not visually warn drivers that gravity is compressing their merge window. By the time recalibration occurs, the junction line is already close.

The hill feels controlled.
The merge window is shorter than it appears.