True or False: There is sufficient clearance along the outside walls in the Market Street Tunnel for safe walking under normal traffic conditions.

The assertion that there is sufficient clearance along the outside walls in the Market Street Tunnel for safe walking under normal traffic conditions is false. This conclusion is based on the design and operational characteristics of the tunnel, which is primarily meant for transit operations rather than pedestrian use.

Typically, tunnels like the Market Street Tunnel are engineered to accommodate trains and associated safety protocols, rather than pedestrian traffic. The clearance provided is often restricted and focused on rail operations, which makes walking alongside the track unsafe. Adequate clearance for safe walking would not be a characteristic of such transit infrastructure under normal operational conditions, where vehicular and train traffic are prioritized.

This understanding underscores that pedestrian safety considerations are critical when evaluating transit facilities, indicating that walking along the tunnel's exterior walls poses real safety risks.