While towing paths were most convenient when they stayed on one side of a canal, there were occasions where it had to change sides, often because of opposition from landowners. Thus the towpath on the Chesterfield Canal changes to the south bank while it passes through the Osberton Estate, as the Foljambes, who lived in Osberton Hall, did not want boatmen passing too close to their residence. On canals, one solution to the problem of getting the horse to the other side was the roving bridge or turnover bridge, where the horse ascended the ramp on one side, crossed the bridge, descended a circular ramp on the other side of the river but the same side of the bridge, and then passed through the bridge hole to continue on its way. This had the benefit that the rope did not have to be detached while the transfer took place. Where the towpath reached a lock, which was spanned by a footbridge at its tail, the southern section of the Stratford-on-Avon Canal used split bridges so that the horse line did not have to be detached. The rope passed through a small gap at the centre of the bridge between its two halves.