State Highway 16
State Highway 16 is being extended from its original terminus at State Highway 44 (West State Street) southward to I-84 East of Nampa. The project Will reconstruct a new 4 lane expressway in stages. Initially the expressway will have at grade intersections with full grade separated interchanges planned in a future phase of construction. Similar to the buildout of the Bruce Woodbury Beltway in Las Vegas.
Construction is being conducted in phases, with the first phase from SH-44 to US-20/26 (Chinden Blvd) having already been completed. The remaining southward extension of the expressway is currently under construction. funding is slated for fiscal year 2019 and 2020 which means construction could begin as soon as 2020 but with a project of this magnitude it could be up to 10 phases of construction
Additionally further improvements to existing State Highway 16 northward to Emmett (SH-52) are being studied in order to address traffic needs through the year 2050.
Construction Details
- Phase one - Complete
- Construction of a 4 lane expressway from SH-44 to US-20/26
- New 4 lane river crossing over the Boise River
- New signalized at grade intersection at US-20/26
- Phase two - Under Construction
- Construct a 4 lane expressway from US-20/26 to I-84
- Signalized intersection at Ustick Road
- Signalised intersection at Franklin Road
- Interchange at I-84
- Additional connecting roads west and east of the expressway
- Phase 3
- Conversion of the SH-44 (W State St) intersection to a grade separated interchange with a one-quadrant partial cloverleaf interchange.
- Conversion of the US-20/26 (Chinden Blvd) intersection to a grade separated interchange with a one-quadrant partial cloverleaf interchange.
- Conversion of Ustick road to a grade separated interchange with a diamond configuration
- Conversion of Franklin road to a grade separated interchange with a single point interchange configuration
- Construction of a "Flying Wye" system interchange to connect SH-16 to I-84 with no traffic signals.
- Future Phases
- Potential improvements to SH-16 north to Emmett.
- A study is planned to explore options for improving the highway segment north to Emmett.