Flatbed Trucking Market Size, Share & Industry Analysis, By Cargo Type (Construction & Building Materials, Metals & Fabricated Metal Products, and Machinery & Heavy Equipment), By End-Use Industry (Construction & Infrastructure, Manufacturing & Industrial, and Metals, Mining & Energy), By Service Type (Full-Truckload Flatbed, Partial Flatbed Loads, and Specialized Oversized Flatbed Transportation), By Haul Distance (Short-Haul, Medium-Haul/Regional, and Long-Haul), By Trailer Type (Standard Flatbed, Step-Deck/Drop-Deck, and Double-Drop/Lowboy Trailers), and Regional Forecast, 2026-2034