406 ITU‐T's Technical Reports and Specifications Figure 17 – Example Utility Tunnel with circular cross section [Source: ITU‐T, b‐28] 3.1.3 Advantages of Utility Tunnels Advantages of Utility Tunnels include: Easier accessibility to utilities for maintenance, upgrading and future expansion [b‐1] Environmental impacts are minimized: such as noise, vibration, dust, disruption to traffic and services, street maintenance requirements [b‐1] Location information is made more accessible. Long‐term collaboration among stakeholders often includes greater emphasis on making duct locations easily known [b‐3] Utility ducts greatly reduce the per unit of surface area occupied [b‐3]