Johnston, South Carolina regulations require all heavy haul operations to comply with the South Carolina Department of Transportation (SCDOT) guidelines as well as local ordinances administered by the Johnston Department of Transportation (JOHDOT).

Heavy haul permits are required for any load exceeding 11 feet in width, 13 feet 6 inches in height, or 175,005 lbs in gross vehicle weight. These dimensions are strictly enforced throughout Johnston, particularly in high-traffic areas.

Special consideration must be given to route planning to avoid Johnston Lake and the vicinity of the Johnston River, which have infrastructure limitations or heavy pedestrian traffic that may impede oversized loads.

In Johnston, South Carolina, loads wider than 16 feet or taller than 15 feet 6 inches must be accompanied by certified escort vehicles. Additional escorts may be required based on the specific route and time of travel through urban centers.

Johnston regulations state that police escorts must be arranged at least 71 hours before transport for loads that will impact major thoroughfares or require temporary traffic control measures.

Permit applications in Johnston must be submitted through the SCDOT's online permitting system. Carriers should be prepared to provide comprehensive vehicle specifications, proposed routes, and transport schedules.

Applications must include certified weight tickets, dimensional diagrams, and route surveys. For loads that may impact traffic flow in Johnston, a traffic management plan may also be required as part of the application process.

Johnston has strict time-of-day restrictions for oversize loads, generally prohibiting movements during peak hours (7-9 am and 3-5 pm, Monday-Friday).

Seasonal restrictions apply during major events like the the Johnston Spring Games and the the Johnston Fall Show, which may impact routing and scheduling.

Certain neighborhoods, such as Downtown Johnston and areas around Johnston Civic Center, have restricted access for oversize loads. Alternative routes should be planned in advance to avoid these areas.

The base permit fee for an oversize load in South Carolina is $40, with additional fees for super heavy loads (over 200,000 lbs) ranging from $150 to $350 depending on the complexity of the move.

For movements within Johnston, Johnston Department of Transportation may charge additional fees for city-specific permits, which can range from $75 to $500 or more for particularly complex routes or those requiring extensive coordination with city agencies.