Toy vehicle track set

A track set for toy vehicles, comprising:

• a base member;
• a loop section, including a loop entrance and a loop exit, defined by a plurality of curved segments, each of the curved segments being releasably secured to at least another one of the curved segments at one end when the loop section is defined by the curved segments, each of the curved segments includes a feature at the one end for engagement with another one of the curved segments or the base member of the track set;
• and
• a release mechanism being movably secured to the loop section between the loop entrance and the loop exit, the release mechanism being capable of movement between a first position in which the curved segments are secured to each other and a second position in which the curved segments are released from each other, wherein a portion of the release mechanism is positionable in a portion of a path defined by the loop section such that an object travelling along the path can move the release mechanism from the first position to the second position.