Salzburg : Neutorstrasse

Neutorstrasse is an important thoroughfare leading into Salzburg's city center from the west. It represents an obligatory passage for all traffic from the western periphery into the old city, which can only be accessed through the short, narrow 18th-century Siegmundstor tunnel under the Mönchsberg, a steep mountain that circles the old city. It carries five bus lines, including three trunk trolleybus lines. Two transit gates have been deployed to give buses priority over private traffic in the eastbound direction.

The first transit gate, managed via a yield, gives priority to buses exiting a curbside bus lane when entering a short shared segment over a pedestrian crossing before moving left to a center-running bus lane. This setup also provides improved safety for pedestrians crossing, with a refuge island and no more than one lane to cross at once.

The second transit gate is controlled by a flashing red signal and is intended to give buses priority over general traffic as they merge into the single shared lane through the narrow tunnel. The traffic signal is upstream of an island platform stop, while the transit signal is just before the merging point. The point of merging, a five-leg intersection, is managed solely via lateral streets, thanks to modal filters that cut through traffic from the local streets to the south. This circulation arrangement allows for a simplified management of this otherwise complex junction. At the other end of the tunnel, a queue-jump lane before a signal gives buses priority over cars entering the tunnel in the opposite outbound direction.