Table 3 The presence of street-trees by street types

Street type Street-trees Non street-trees Total
National road 45 45 90
Local road 45 63 108
Gun-road 33 57 90
Myun-road 29 61 90
Li-road 28 62 90
Nong-road 15 75 90
Urban road 82 8 90
Total(%) 227(42.7) 371(57.3) 648(100)