 So in this paper, we propose a new benchmark dataset, named \textit{Topo-boundary}, for off-line topological road-boundary detection.
<fluency>  So in this paper, we propose a new benchmark dataset, named \textit{Topo-boundary}, for off-line topological road-boundary detection.
 So in this paper, we propose a new benchmark dataset, named \textit{Topo-boundary}, for offline topological road-boundary detection.