- Knightscope autonomous security robots are now patrolling public areas in San Francisco, illustrating the growing deployment of mobile surveillance and robotics in urban environments.  
- Helsinki's official Underground Master Plan (https://www.hel.fi/helsinki/en/housing/planning/current/underground-master-plan) was shared as a reference for large-scale subterranean urban development, offering a model for resilient, space-efficient city infrastructure.