Mississippi Code Title 63. Motor Vehicles and Traffic Regulations § 63-3-505

The driver or operator of any motor vehicle must decrease speed when approaching and crossing an intersection, when approaching and going around a curve, when approaching a hill crest, when traveling upon any narrow or winding roadway, or when special hazard exists with respect to pedestrians or other traffic. All trucks, or truck-trailer combinations and passenger buses shall be required to reduce speed to forty-five miles per hour during inclement weather when visibility is bad.