Along the Alsancak Coastal Road, bus stops are positioned directly on the active carriageway without recessed bays. During evening return hours, public transport activity overlaps with dense private vehicle flow.
The compression forms at re-entry.
Time pattern: 17:30–19:00 weekdays.
Unlike late-night café clustering or event surges, this pattern is structured and repetitive. Buses stop at fixed points. Passengers board and alight. Traffic behind slows briefly, then anticipates forward release.
The delay occurs when the bus attempts to pull out.
A typical sequence unfolds:
Bus halts in-lane at a marked stop.
Private vehicles queue behind at reduced spacing.
Oncoming eastbound flow remains continuous.
Bus signals to re-enter westbound movement.
A small gap appears but closes quickly.
The bus hesitates.
Drivers behind the bus anticipate movement and begin gentle acceleration. When the bus remains stationary longer than expected, a secondary compression wave forms.
Some drivers attempt partial rightward positioning to assess overtaking possibility, even when lane width does not safely permit it. This lateral probing narrows the safety envelope further.
Historically, as vehicle ownership increased through the 2010s and 2020s, bus stop interference with private flow intensified. The road geometry remained unchanged. Traffic density increased.
Evening light complicates depth perception. Brake lights from queued vehicles blend with storefront illumination. The bus indicator may be less visible against illuminated commercial backgrounds.
The structural seam forms under four conditions:
In-lane bus stop
Continuous opposing traffic
Short merge gap
Rear driver anticipation
The risk is not aggressive overtaking alone. It is expectation mismatch. Drivers assume immediate bus departure once signaling begins.
On the Alsancak Coastal Road, the bus cannot re-enter without a full safe gap. That gap often arrives later than the queue expects.
The bus waits.
The compression grows behind it.
