What gear should be used for manual transmission on different roads?

[TylerDella]

Manual transmission uses different gears depending on the road conditions. Road condition factors: Because uphill and downhill driving places high demands on the engine torque, gear 1 is generally used. For gentle slopes, gear 2 can be used. Gears 4 and 5 are engaged when higher speeds are required. Typically, gear 3 is used for urban driving. Operational factors: When continuous overtaking is needed, speed should be increased to raise engine RPM and delay gear shifting. On gravel roads or in snowy/wet conditions, gear shifting can be done earlier to prevent excessive engine RPM and avoid skidding or loss of control due to excessive torque. During long uphill climbs, downshifting should be done to increase engine RPM and obtain greater climbing torque. Similarly, on long downhill slopes, gear shifting is necessary, though the purpose differs from uphill driving—using lower gears to utilize engine braking and limit vehicle speed, avoiding prolonged brake use that could lead to brake fade due to overheating.