Centers (or designated dancers) slide sideways toward the Outsides (or non-designated dancers) who move into the vacated space.

before Lateral Substitute   half-way   after

before Tandem-Based Triangle Lateral Substitute   half-way   after In the above example, just slide sideways to Substitute The Triangle.

• To avoid collisions, the Centers (or designated dancers) may have to temporarily move forward or backward to move around the other dancers.
• Nobody changes their facing direction during a Lateral Substitute.
• The difference between Substitute [C1] and Lateral Substitute is the facing direction of the Centers (or designated dancers). On a Substitute, these dancers move forward or backward; On a Lateral Substitute, at least one of these dancers moves sideways.

Substitute [C1]: From Generalized Columns. Centers raise joined hands to make an arch and (moving toward the nearest Outsides) move forward or backward as the Outsides move into the Center. The traffic pattern has the Centers moving around the Outsides. Substitute exchanges the Centers with the Outsides. Nobody changes their facing direction during this call, and, in practice, dancers rarely make the arch. From Tandem Couples, Lead Couple arch & back up as Trailing Couple Steps Ahead (Circulate).