Project Description:

The segment of I-80/US 50 between Davis and downtown Sacramento serves as the primary linkage between the San Francisco Bay Area and the Sacramento Region. The thirteen mile segment spans the length of Yolo County and functions primarily as a directional three or four lane mixed-flow facility. The corridor was identified in the CSMP process as a priority for potential improvements, including expansion of the region's HOV network. The study will attempt to identify and prioritize corridor improvements, including the addition of HOV lanes, mixed-flow lanes, auxiliary/transition lanes, and ramp metering, that will enhance mobility along the corridor over the next 25 years.

Contact Info:

Susan Zanchi
susan.zanchi@dot.ca.gov
(530) 741-4199

Project Scope:

Activity	Deadline Date	Primary Function(s)
Introduction, Need, and Purpose	4/30/13	Planning
Corridor Background	4/30/13	Planning
Existing Conditions: AADT, LOS Delay, other Performance Measure	Completed	SMP & PD
Future (No Build) Conditions	Completed	SMP & PD
PDT Meeting(Internal/External Stakeholders) Pre-Mtg w/Internals (Candidate Improvement Projects) PI Status Update ID /Consensus (Candidate Improvement Projects)	Completed	All
Website and Email Updates to Stakeholders	3/29/13	Planning
Scope, Cost Estimates and Challenges for Improvement Projects Environmental Right of Way PID Office	4/30/13	Advance Planning/ROW/Env
Analysis of Candidate Improvement Projects: (SMP & PD )micro-simulation modeling using future conditions info Benefit Cost Analysis (Planning) Strategy/explanation in Study	4/30/13	SMP & PD/Planning
Prioritization (Internal Mtg) of Candidate Improvement Projects Internal Stakeholder/expert meeting External (PDT Mtg): Stakeholder Consensus on Candidate Improvement Projects Priorities	5/31/13	Planning/Traffic Operations (ROW/Env, if needed)
Draft PI Internal review External and Executive Review	6/1/13	All
Final PI Print/Post Final I-80 PI to Web	6/30/13	Planning/Webmaster

Simulation video of existing AM peak period conditions for the I-80/US 50 corridor on a typical weekday:

Simulation video of existing PM peak period conditions for the I-80/US 50 corridor on a typical weekday:

 

Phased Proposed Project List
Phase	Project Type	PM	Description
1	Ramp Meter	I-80 EB YOL PM 0.4	At Richards Blvd EB on-ramp, install single lane ramp meter with HOV bypass lane
		I-80 WB YOL PM 0.1	At Richards Blvd WB on-ramp, install double lane ramp meter with HOV bypass lane
		I-80 EB PM 2.8/3.2	At Mace Blvd EB on-ramp, widen the eastbound on-ramp to include two metered mixed-flow lanes with an HOV bypass lane and construct a 2000 ft. transition lane from the ramp gore point
		I-80 WB YOL PM 2.5	At Mace Blvd WB on-ramp, install single lane ramp meter with HOV bypass lane
		I-80 WB YOL PM 5.6	At Chiles Rd. EB on-ramp, install a restrictive single-lane ramp meter to discourage traffic bypassing the Mace Blvd. interchange
		I-80 EB YOL PM 2.9	At South River Rd EB on-ramp, install single lane ramp meter with HOV bypass lane
2	HOV Lane	I-80 EB YOL PM 2.4 to 9.1	In the eastbound direction, widen to construct an HOV lane on I-80 from near roughly Mace Blvd. to Enterprise Blvd.
		I-80 WB YOL PM 9.2 to 2.5	In the westbound direction, widen to construct an HOV lane along I-80 from roughly Enterprise Blvd. to Mace Blvd.
3	Auxiliary Lane	I-80 EB SOL PM R 44.6 to YOL PM 0.1	Extend I-80 EB outside lane drop from SR 113 at SOL PM R 44.6 approximately 2,000 feet to YOL PM 0.1 to form an auxiliary lane that terminates at Richards Blvd
	HOV Lane	I-80 EB YOL PM 9.1 to US 50 YOL PM 0.7	In the eastbound direction, restripe outside mixed-flow lane as HOV lane from near Enterprise Blvd. to the interior of the I-80/US 50 interchange
		US 50 EB YOL PM 0.7 to 1.4	In the eastbound direction, widen to construct an HOV lane along US 50 from the interior of the I-80/US 50 interchange to the interior of the Harbor Blvd. interchange
		US 50 YOL PM 1.8 to 0.3	In the westbound direction, restripe outside mixed-flow lane as HOV lane along US 50 from the beginning of the WB Harbor Blvd. transition lane to the interior of the I-80/US 50 interchange
		US 50 YOL PM 0.3 to I-80 YOL PM 9.2	In the westbound direction, widen to construct an HOV lane along I-80/US 50 from the interior of the I-80/US 50 interchange to near Enterprise Blvd.
4	HOV Lane	I-80 EB SOL PM R 44.6 to YOL PM 2.4	In the eastbound direction, realign Phase 3 auxiliary lane widening between SR 113 and Richards Blvd to the outside at I-80 EB SOL PM R 44.6 (eliminating exit-only lane at Richards Blvd.) and extend as an HOV lane to YOL PM 2.4
		I-80 WB YOL PM 2.5 to SOL PM R44.5	In the westbound direction, widen to construct an HOV lane along I-80 from Mace Blvd. to just past the YOL/SOL county line
5	Auxiliary Lane	US 50 EB YOL PM 2.9 to SAC PM L 0.2	Construct an auxiliary lane between the South River Rd. on-ramp and the I-5 freeway off-ramp
		US 50 WB SAC PM L 0.2 to YOL PM 2.6	Construct an auxiliary lane between the I-5 on-ramps (US 50 WB SAC PM L 0.2) and the South River Rd./Jefferson Blvd. off-ramp (US 50 WB YOL PM 3.0); widen ramp to two lanes before the S. River Rd./Jefferson Blvd split, with one lane feeding each ramp; extend a merge area 2,000 feet past the ramp to I-80 WB YOL PM 2.6
	HOV Lane	US 50 WB YOL PM 1.4 to SAC PM 0.0	In the eastbound direction, widen to construct an HOV lane along US 50 from near Harbor Blvd. to near the junction with I-5
		US 50 WB SAC PM L 0.2 to YOL PM 1.8	In the westbound direction, widen to construct an HOV lane along US 50 from near the I-5 junction to the beginning of the WB Harbor Blvd. transition lane