Ph.D.;
candidate;
of;
School;
of;
Traffic;
and;
Transportation,;
Beijing;
Jiaotong;
University,;
Beijing,;
China,;
Postcode:;
100044;
prof.;
and;
Ph.D.;
supervisor;
of;
School;
of;
Traffic;
and;
Transportation,;
Beijing;
Jiaotong;
University,;
Beijing,;
China,Posteocle:;
100044;