Vehicle Routing Problem with Soft Time Windows Based on Improved Genetic Algorithm for Fruits and Vegetables Distribution

Table 1

Road class and evaluation coefficient.

Surface class	Road class	Surface materials
High type	Expressway,; first-class highway	(1) Asphalt concrete; (2) Cement concrete	1.02
Subhigh type	Second-class highway,; third-class highway	(1) Bituminous penetration; (2) Asphalt macadam; (3) Bituminous surface treatment	1.12
Intermediate type	Fourth-class highway	(1) Graded aggregate; (2) Half tidy stones; (3) Other aggregates	1.23
Low type	Fourth-class highway	(1) Aggregate strengthen soil; (2) Others	1.41