Where are clearance gauges typically located on a bridge?

Clearance gauges on a bridge are typically positioned at the right side of the bridge structure. This placement allows mariners to easily assess the vertical clearance available under the bridge when navigating. The gauges are strategically positioned to provide a clear view from the vessel as it approaches the bridge, ensuring that the operator can quickly determine whether the clearance is adequate to pass safely beneath the structure.

Having the gauges on the right side aligns with navigational practices, as it is common for vessels to navigate with the right side being the reference point when approaching any fixed obstacle. This helps in maintaining safe visibility for a wide range of vessel types, thus enhancing navigational safety. The placement of gauges not at the center or the left side is typically due to practical reasons and the usual convention of operation on waterways.