The conversion of HOV to HOT lanes in Los Angeles increased vehicle throughput on I-10 and I-110, however, net emissions increased by 26 to 82 percent and by 6 to 21 percent, respectively as VMT increased.

The Los Angeles Congestion Reduction Demonstration (CRD) projects evaluated tolling, technology, transit, and travel demand management strategies.

Los Angeles; California; United States

Summary Information

The Los Angeles-Long Beach-Santa Ana metro area is home to 13 million people and has the second highest population density in the United States. The region has the most extensive freeway system in the United States, in addition to a comprehensive public transit system. The area is one of the most congested areas in the United States.

The Los Angeles (LA) Congestion Reduction Demonstration (CRD) projects included:

Tolling: Converting HOV lanes and restriping created dynamically-priced HOT lanes; the 11-mile ExpressLanes on I-110 opened on November 10, 2012 and the 14-mile ExpressLanes on I-10 opened on February 23, 2013. Tolls range from $0.25 to $1.40 per hour, depending on congestion, paid with an electronic FasTrak transponder.

Parking Management: LA Express Park is an integrated parking management system that relies on state-of-the-art parking sensors, parking meters, and parking guidance technologies, as well as advanced analytical capabilities.

Transit: Increased frequency of bus rapid transit (BRT), additional transit signal priority (TSP) deployment, and capital improvements.

Travel Demand Management: Formation of new vanpools.



The ExpressLanes resulted in greater vehicle throughput and vehicle miles traveled (VMT) on I-10 and I-110. Emissions increase with VMT. Net VMT increased by 30.5 percent on I-10 and by 6.6 percent on I-110. It is unknown if the added traffic was previously using alternate routes, is latent demand, or the growing economy. It was likely a combination coupled with a decrease in vehicle occupancies.

On I-10, net emissions increased by 26.1 to 82.1 percent, depending on the pollutant. On I-110, net emissions increased by 6.1 to 21.4 percent, depending on the pollutant. The cost of these increased emissions was estimated at $14,938,606.

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Los Angeles Congestion Reduction Demonstration ExpressLanes Program: National Evaluation Report

Author: Schroeder, Jeremy, et al.

Published By: U.S. DOT Federal Highway Administration and Federal Transit Administration

Source Date: 08/31/2015

Other Reference Number: FHWA-JPO-14-126



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high occupancy vehicles, carpool lanes, high occupancy vehicle lane, managed lanes, HOV, congestion pricing, value pricing, variable road pricing, HOT lanes, emissions, Los Angeles, congestion reduction demonstration projects, tolling

Benefit ID: 2017-01160