Current composition
| ICGC: 9 members |
| BCASA: 2 members |
| CEDIPSA |
| UPC |
| UAB |
| UB |
| Advisory Board of Tunnels |
| Infraestructures.cat |
| ACA |
| AMB |
| City Council of Barcelona |
| ICGC: 9 members |
| BCASA: 2 members |
| CEDIPSA |
| UPC |
| UAB |
| UB |
| Advisory Board of Tunnels |
| Infraestructures.cat |
| ACA |
| AMB |
| City Council of Barcelona |