2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/131722We study unit horizontal bundles associated with Riemannian submersions. First we investigate metric properties of an arbitrary unit horizontal bundle equipped with a Riemannian metric of the Cheeger-Gromoll type. Next we examine it from the Gromov-Hausdorff convergence theory point of view, and we state a collapse theorem for unit horizontal bundles associated with a sequence of warped Riemannian submersions.9 pagesDifferential GeometryMetric Geometry53B21; 70G45text