Self-Propelled Modular Transporters
A Self-Propelled Modular Transporter is a combination of multi-axle platforms operated through a state-of-the-art computer-controlled system that is capable of pivoting 360 degrees as needed to lift, carry, and set very large and heavy loads of many types.
SPMTs are motorized vehicles that move at walking speed and are capable of carrying large structures, such as bridges, from offsite locations, positioning them precisely into final position. The SPMT then exits the site, opening the area to traffic possibly within minutes or certainly within a few hours.
What is a Self-Propelled Modular Transporter - or SPMT?
The Federal Highway Administration (FHWA) has identified reducing construction-related impacts to the traveling public as a major priority for the nation's highway program.
The use of self-propelled modular transporter (SPMT) technology provides agencies and contractors with the ultimate flexibility and speed in removing and installing bridges.
Introduction
Best Applications
- Best Applications for SPMT Bridge Moves PowerPoint Presentation
- SPMT animation: Float In (11 sec) wmv file
- SPMT animation: Ramp (13 sec) wmv file
- SPMT animation: Span Replacement (31 sec) wmv file
- SPMT animation: Straddle Found (27 sec) wmv file
- SPMT animation: Progressive (47 sec) wmv file
Demonstration Bridge Moves
Library
Policies, Specifications, and Drawings
- UDOT Special Provision, Section 03253S, Bridge Construction Using Self-Propelled Modular Transporters (SPMT)
- UDOT Contract Drawings for SPMT Bridge Moves
Manuals & Other Resources
- FHWA Manual on Use of Self-Propelled Modular Transporters to Remove and Replace Bridges, 2007
- UDOT Accelerated Bridge Construction SPMT Process Manual and Design Guide, 2009
- UDOT Master Process for Bridge Moves Using SPMTs
Case Studies
Florida
Louisiana
Utah
- 2007, 2008, 2009 SPMT Bridge Moves
- UDOT ABC Workshop Presentation on Summer 2008 SPMT Bridge Moves
- KSL Radio on the Web: "UDOT Moves Bridge Into Place" October 28, 2007