We’ve been talking about flagging, tapers and all sorts of elements in traffic control. We know how we can set them up and what we’re going to use them to do. Now’s the time where we want to be sure our plan is ready to go. After all, it’s all about the transportation management plan (TMP) at this point.
TMPs minimize traffic delays due to construction, as well as helping prevent accidents. That’s a result of effectively applying traditional traffic handling practices, adding a combination of traffic strategies in innovative ways. Using those strategies, a TMP will effectively manage work zone impacts of a project.
A plan’s scope, content and degree of detail may vary depending on the expected impact of the project’s work zone. For significant projects a TMP has three components:
- Temporary traffic control (TTC)
Facilitates roadway use through a work zone or incident area
- Transportation operations (TO)
Strategies used to mitigate impacts of the work zone and impact area
- Public information (PI)
Communications strategies to inform affected road users, the general public, area residences and businesses, and appropriate public entities about the project. This includes expected work zone impacts and changing conditions on the project.
Now that we have the components, we develop the TMP using these steps:
- Understand the project
- Develop project specific objectives
- Brainstorm TTC plan alternatives
- Develop a construction phasing concept
- Examine and analyze alternatives that meet the objectives
- Develop detailed TTC plan
TTC plans are developed in three distinct phases. These phases provide timely opportunities for designers to coordinate traffic control plan development with other key stakeholders.
- Phase I
Designer has a rough concept outline for the project.
- Phase II
The designer should prepare many of the plan details, including major components such as detour location and geometry, barrier wall needs, advance signing layouts, references to standard indexes, temporary markings at special locations (detours, transitions, intersections, gore areas), temporary drainage needs, special devices.
- Phase III
TTC should be complete, including pay items. The pay item list should be provided to reduce the possibility of supplemental agreements due to missing pay items.
That leaves us to move on to the transportation options and the public information components of the TMP. We’ll cover both of those in my next post.