(7) anthology old do not choose new be in muddy road when transport condition, to make sure safety is passed, course choice should insist to choose old do not choose new, choose original rut line to advance namely, do not monarch newly easily course. Because wheel of original rut place classics is ground repeatedly,press, although rut is deeper, but bottom is harder, adherent coefficient is taller, the dependability that pass is bigger.

(8) choose the condition that choosing curved car to maintain linear travel continuously is implementation balance motion, linear travel can avoid those who leave mental efforts to generate, increase travelling speed. Requirement car is in travel besides change because of viatic or besides other condition impact, cannot optional curve travel. Answer to choose route of straighter drive a vehicle as far as possible on course choice.

(9) choose bump not to choose a turn (when holding a person) when the car carries person travel, the curvilinear travel of the car can cause the rock of personnel, add insecure element. Additional, change direction to avoid region state of affairs, make the car sails Xiang Lu's a side, appear easily accident. Accordingly, when the car carries person travel, notice not optional and rotational steering wheel, would rather bump also hit steering wheel less to do as far as possible circuitous.

(10) choose a turn not to choose bump (when carry cargo) when travel of car carry cargo, because weight is heavier, and with the car the knot is an organic whole, if appear,bump jumps, goods and bodywork produce resonance, can make car batholith bearings twice increases, cause the damage of parts, because this carry cargo is different from,hold a person, want to control bump strictly to jump, outstanding to the ground obstacle is adopted as far as possible change direction circuitous. Good speed should be done to cooperate when changing direction, reduce those who leave mental efforts to increase as far as possible, form new critical element in case.

The selection method of course of drive a vehicle still has a lot of, if winter drive a vehicle chooses ground mediumly,do not choose drive a vehicle of snow, market town anthology static do not choose be troubled by etc. Should capture only be helpful for safe drive a vehicle, be helpful for be being passed smoothly, the principle such as the processing that is helpful for all sorts of complex cases, operation that is helpful for parts, can be united in wedlock conditional naturally makes science, logical course choice now.