Plus-end directed kinesin-like motor enzyme that plays a critical role in the organization of phragmoplast microtubules during cytokinesis. Constitutes a signaling module in association with serine/threonine-protein kinase TIO that is required to support phragmoplast expansion and cell-plate growth in plant cells. Binds microtubules in an ATP-sensitive manner. {ECO:0000269|PubMed:10898978; ECO:0000269|PubMed:17720869}.