Expo Curtailment & Weather Rebalancing Studio

When severe typhoons, storm surges, or extreme weather force public conventions to shut down early—as seen at Tokyo Game Show Makuhari Messe—organizers must rapidly recalculate transit shutoff windows, shift stage reveals to digital broadcast, throttle safe train evacuation, and secure freight pack-out corridors.

Scenario Presets:

Keiyo / Transit Halt Deadline

14:00

Sustained wind ≥ 25 m/s

Crowd Evacuation Buffer

3.5 hrs

68,000 attendees / 3 transit gates

Program Salvage Rate

82%

14 / 17 Keynotes & Finals Preserved

Teardown Freight Safe Slot

08:00 - 12:30

Pre-Landfall Packout Window

Weather & Curtailment Controls Simulate Landfall

Forecast Landfall Time (Peak Gusts) Sunday 17:00 Estimated point of center eye crossing within 50km radius. Peak Wind Gust Velocity 42 m/s (Category 2) JR Rail stops at 25 m/s; shuttle buses cease at 30 m/s. Forced Curtailment Call Close 1 Day Early Turnout Volume on Curtailment Day 72,000 visitors Exhibitor Teardown Freight Strategy

Command Assessment

Typhoon force winds will disrupt Keiyo Line by 13:30. Evacuation must start no later than 10:00 to prevent a bottleneck of 72,000 visitors at Kaihin-Makuhari station.

Live Operations Visual Timeline Condition: Curtailment Advised

24-Hour Operations & Threat Envelope

Wind Speed (m/s)

Train Stop (25m/s)

Safe Transit Window

Evacuation Surge

06:00 (Gates Open) 12:00 (Noon Cutoff) 18:00 (Typhoon Surge) 24:00 (Midnight Calm)

Re-allocate scheduled Sunday events to digital live streams, advance into Saturday night, or archive:

Time Slot	Production Event	Type	Est. Audience	Rebalance Action

Ready. Adjust weather or scenario to re-simulate.

Operational Guide: Curtailing Mega-Conventions Under Severe Weather

The Train Threshold Bottleneck

Venues like Makuhari Messe (TGS) or Koelnmesse (Gamescom) rely on elevated commuter lines (e.g., JR Keiyo Line). Japanese rail operators suspend service when winds reach 25 m/s or rain exceeds 40mm/hr. If attendees remain on-site when lines halt, 50,000+ people become stranded, forcing costly overnight emergency shelter protocols.

Digital Pivot Over Cancellation

World premiere trailers and esports finals do not have to be lost. By shifting live-stage presentations to designated sound-isolated Twitch/YouTube broadcast suites on Saturday night or Sunday morning, publishers retain sponsor impressions and broadcast metrics while ensuring attendee safety.

Dock Micro-Scheduling & Rigging

During typhoons, sudden opening of large freight doors can cause negative pressure damage to convention center barrel roofs. Structured curtailment requires staggered pallet dispatch and pinning suspended lighting rigs before wind shear reaches danger thresholds.