5DAVID W EBY,LISA J MOLNAR.Importance of scenic byways in route choice:a survey of driving tourists in the United States[J].Transportation Research Part A,2002,36:95-106.
6DAHLQUIST D L,PETERSON K.Assessing visitor responses to Iowa scenic byways pilot program[M].Transportation Research Record 1599,1997.81-95.
7K F AKBAR,W H G HALE,A D HEADLEY.Assessment of scenic beauty of the roadside vegetation in northern England[J].Landscape and Urban Planning,2003,63:139-144.
