Taiwan's most ambitious project in a generation

The Danjiang Bridge spans the Tamsui River estuary with a 450-meter main span, making it the world's longest-span single-tower asymmetric cable-stayed bridge. For decades, the aging Guandu Bridge upstream carried the region’s growing demands, creating increasing pressure on a critical transportation route.

Built to help relieve that pressure, the Danjiang Bridge shortens cross-river travel by approximately 15 kilometers and reduces travel time by an estimated 25 minutes. It serves six simultaneous transport modes on an expressway-classified corridor, from pedestrians and cyclists to private vehicles and buses, making it a critical artery for New Taipei City and the wider region.

To support safe, continuous operations at this scale, Taiwan’s first dedicated bridge control center was established to oversee the corridor around the clock. That required a surveillance system capable of delivering reliable, comprehensive visibility across the full span of the bridge.

Not a standard surveillance procedure

The exposed location demanded reliable performance in extreme weather and low-light conditions without sacrificing image quality.

Coverage needed to stretch beyond the range of conventional fixed cameras, leaving no gaps across the full length of the bridge.

With pedestrians, cyclists, scooters, motorcycles, cars, and buses all commuting across the bridge, the control center needed to track incidents, enforce traffic regulations, and monitor pedestrian safety simultaneously across the entire bridge.

Wide-area, all-weather coverage with fewer cameras

Complemented by VIVOTEK's bullet and LPR cameras, the combined architecture delivers flexible, wide-area, all-weather monitoring — making it ideally suited to one of Taiwan's most challenging outdoor environments.

The decision went beyond specifications. For a project of national significance, trust and credibility matter as much as technology.

VIVOTEK's 25-year presence in Taiwan brought both — proven hardware backed by a partner with deep local roots. Its comprehensive AI ecosystem meant the bridge authority was not simply buying a surveillance system, but investing in a platform designed to grow with the bridge's expanding needs.

Top: PTZ camera | Wide-area monitoring
Bottom: Bullet camera | Targeted coverage
Image courtesy of iDS magazine. Used with permission.

Turning coverage into usable traffic data

The control center sets its own flow thresholds for any location on the bridge. When vehicle or pedestrian volume crosses a certain threshold, the system notifies operators as conditions develop.

Analysis areas and rules can be configured in advance for continuous monitoring of specific locations or defined afterwards against recorded footage from a selected road section and time period.

The system identifies and counts cars, trucks, buses, motorcycles, and bicycles as distinct categories, and counts pedestrians alongside them, distinguishing riders from people walking on the sidewalk.

Flow analysis across time periods informs signal-timing decisions; the system supports license plate recognition, and all back-end data exports to CSV for consolidation and reporting.

Uninterrupted visibility, at any hour

Comparable coverage with fixed cameras would have required significantly more units, making the PTZ solution a more practical and operationally efficient choice for a project of this scale.

Enables traffic flow analysis, threshold-based alerts, vehicle classification, pedestrian counting, license plate recognition, and retrospective analysis of recorded footage, with all data exportable for reporting.

Provides continuous surveillance capability ahead of the bridge’s public opening, helping ensure monitoring is in place from day one.

Delivers 24/7 visibility across the active corridor, supporting reliable monitoring day and night, in the bridge’s exposed marine environment.

Uses PTZ cameras to achieve broad coverage with significantly fewer units than an equivalent fixed-camera deployment, reducing infrastructure requirements while maintaining effective surveillance.

Meets the project’s demanding technical requirements while delivering a competitive balance of cost, coverage, and performance.

Establishes a platform for future expansion, including additional bullet cameras for AI-powered traffic analytics and IP speakers for public safety communications as operational needs evolve.

As one of Taiwan’s most iconic new cross-river infrastructure projects in recent years, the Danjiang Bridge required a partner we could trust for the long term.

That is why we chose VIVOTEK. Its solution fully meets the core demands of a project of this scale, delivering comprehensive, multi-angle coverage across the entire bridge from day one, while providing a robust intelligent platform that can continue to expand alongside the bridge’s smart infrastructure vision.