As part of the planning and engineering process and the Traffic Engineering office, projects identified for construction will have a maintenance of traffic (MOT) plan established during or at the conclusion of the preliminary engineering phase. Projects in which roadways may be closed during construction typically include bridge replacements, culvert replacements and slide/slip repairs, and the determination to close routes for such projects is based on comparative data between part-width construction and closure and information gathered during a detour justification process. In this process, consideration is given to traffic impacts to public safety and emergency responders, transportation providers, businesses, residents and tourist attractions; average daily traffic (ADT); safety; constructability; environmental impacts; local detour; and cost.
Planning, Engineering & Maintenance of Traffic
Traffic Engineering is that aspect of the district's Planning & Engineering Department which deals with the planning, geometric design and traffic operations of roads, streets, highways, their networks, terminals, adjacent lands and relationships with other modes of transportation for the safe, efficient and convenient movement of people and goods. District 9's Traffic Engineering office is responsible for:
- Traffic Control Device requests; i.e. new signals, signs, pavement markings and lighting
- Traffic & Safety studies
- Speed Zone studies
- Access Management
- Local Safety Programs & Highway Safety Program Administration
- Traffic Signal permits & agreements
- No Parking Zone studies
- Traffic Count data
- School Zone regulations
Information regarding routes currently scheduled for closure during construction and the detour justification process can be found via the links below, and for more information regarding the MOT plan for projects that have been identified for closure, please contact the public information office via this link.