Equal egressibility is the principle that any person — including a person of restricted mobility — should be able to exit a railway station to a place of relative safety in a defensible time. In a sub-surface station this is structurally harder than at street-level premises: vertical evacuation against gravity, single-direction escape via cross-passages, and reliance on emergency-services intervention for the final phase of evacuation are all factors that need to be engineered, not assumed.
JWCS delivers Equal Egressibility Strategy reports that combine quantitative pedestrian-movement calculation (commonly BS 9992 Annex A or equivalent NUMBAT-based methods), refuge area provision, escape route engineering, and intervention-plan co-ordination with the relevant fire and rescue service.
The work spans new-build station projects where equal egressibility must be designed in from concept, and accessibility-upgrade programmes where the existing infrastructure must be retrofitted to a workable PRM evacuation provision.