1 Erratum

Since the publication of our article [1] we have become aware that we omitted to cite the work of Lou et al. (2009) [2]. The first sentence of subsection 3.3 should read as follows: “In subsections 3.3 and 3.4, “Time Analysis” and “Result Matching”, which are based on the methods proposed by Lou et al. (2009) [2], are utilized as the part of our design flow. These two steps are summarized as follows.” In addition, the legend for Fig. 3 should read: “Influence factors of track point matching time speed information. Adapted from Lou et al. (2009) [2] with permission.” We apologize to Lou et al. and to readers for this omission.