①Whether it is uphill or downhill, the bottom layer of the asphalt mixture must be clean and dry, and the asphalt binding layer must be sprayed to prevent the mixture from slipping during rolling.

②Whether it is rolling uphill or rolling downhill, the driving wheel of the road roller should be behind. This has the following advantages: when going uphill, the rear drive wheel can bear the driving force provided by the ramp and the machine itself, while the front wheel performs preliminary compaction on the road surface to withstand the larger shear force generated by the drive wheel ; When going downhill, the impact force generated by the self-weight of the road roller is offset by the braking of the driving wheel. Only the mixture rolled by the front wheel has the ability to support the rear driving wheel to generate shearing force.

③ When rolling uphill, the roller should start, stop and accelerate smoothly to avoid too high or too low speed.

④Before the uphill rolling, the mixture should be cooled to the specified lower limit temperature, and then static pre-compression should be carried out. When the mixture temperature drops to the lower limit (120°C), vibration compaction should be adopted.

⑤ Downhill rolling should avoid sudden shifting and braking.

⑥ When rolling downhill with a very steep slope, a light roller should be used for pre-compression, and then a heavy-duty roller or a vibratory roller should be used for compaction.