High-occupancy toll lane

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FasTrak high-occupancy toll (HOT) lanes at 91 Express Lanes, at Orange County, California.

A high-occupancy toll lane (or HOT lane) is a type of traffic lane or roadway that is available to high-occupancy vehicles and other exempt vehicles without charge; other vehicles being required to pay a variable fee that is adjusted in response to demand. Unlike toll roads, drivers have an option to use general purpose lanes, on which a fee is not charged. Express toll lane, which are less common, operate along similar lines, but do not exempt high-occupancy vehicles.


The concept developed from high-occupancy vehicle lane systems in order to increase utilisation of the available capacity. Most implementations are currently in the USA.

The first practical implementation was California's formerly private toll 91 Express Lanes, in Orange County, California, in 1995, followed in 1996 by Interstate 15 north of San Diego.[1][2] According to the Texas A&M Transportation Institute, by 2012 there were 294 corridor-miles of HOT/Express lanes in operation in the United States and 163 corridor-miles under construction.[3]

HOT lanes were added to Highway 1 in Israel in 2011.[4]


An in-vehicle FasTrak transponder fitted to the dash-board of a vehicles

Some system are reversible, operating in one direction during the morning commute and in the reverse direction during the evening commute. It is typically collected using and electronic toll collection systems, automatic number plate recognition or at manned toll booths. Exempt vehicles typically include those with at least two, three or four occupants, those that use approved alternative fuels, motorcycles, transit vehicles and emergency vehicles.[5]

The fee, which is displayed prominently at entry points to the lanes, is adjusted in response to demand to regulate the traffic volume and thereby provided a guaranteed minimum traffic speed and level of service.[6][7][8] [9][10]

The Los Angeles Metro ExpressLanes HOT system requires vehicles to be fitted with manually "switchable" transponders where the driver selects the number of occupants, based on which the appropriate fee is charged.[11][12] Highway patrol troopers have a device in their vehicle which displays the declared number of occupants, allowing them to check if the visually checked to see if there are more or fewer people in the car than indicated on the transponder.[13]

Funding and construction[edit]

Implementation of these systems can be prohibitively expensive, due to the initial construction required—particularly with regard to providing access to and from the express toll lanes at interchanges. However, the long-term benefits—the decrease in delay to motorists and increased funding for the transportation agency—may outweigh the costs. To offset costs of construction, many transportation agencies lease public roads to a private institution. As a result, construction may be partially or fully funded by the private institution, which receives all of the income from tolling for a specified period of time.[14][15]


Because HOT lanes and ETLs are often constructed within the existing road space, they are criticized as being an environmental tax or perk for the rich ("Lexus lanes").[citation needed] Supporters of HOT lanes note that being encouraging the use transit and ride sharing they reduce demand and provide a benefit for all, also that the rich have many ways to ease their commute, such as buying a home closer to where they work.[16]

Few existing highways in North America are 100% ETL.[citation needed]

See also[edit]


  1. ^ Dave Downey (2007-01-07). "The HOT lane hype". The North County Times. Retrieved 2008-07-15. 
  2. ^ Metropolitan Transportation Commission. "High-Occupancy-Vehicle (HOV) and High-Occupancy/Toll (HOT) Lanes: Frequently Asked Questions". Retrieved 2008-03-01. 
  3. ^ Urban Land Institute (ULI) (2013). "When the Road Price Is Right – Land Use, Tolls, and Congestion Pricing". Urban Land Institute. Retrieved 2013-04-09.  See Figure 2, pp.6
  4. ^ "Tel Aviv toll road starting to win over skeptics". 
  5. ^ "Exempt Vehicles". 
  6. ^ FAQ - VA I-495 HOT Lanes Retrieved October 6, 2009
  7. ^ Brookings Institution economic study on HOT Lanes
  8. ^ MD I-95 Express Toll Lanes Retrieved October 6, 2009
  9. ^ "Northern Virginia Transportation Alliance". 
  10. ^ "Golden Gate Bridge for variable toll". 
  11. ^ "FAQs: FasTrak". Metro ExpressLanes. Los Angeles County Metropolitan Transportation Authority. Retrieved March 3, 2013. 
  12. ^ "FAQs: Driving Metro ExpressLanes". Metro ExpressLanes. Los Angeles County Metropolitan Transportation Authority. Retrieved March 3, 2013. 
  13. ^ Metro ExpressLanes: Rules of the Road (YouTube). Los Angeles County Metropolitan Transportation Authority. July 24, 2012. 2 minutes in. 
  14. ^ About I-495 HOT Lanes Retrieved August 31, 2009
  15. ^ A Guide for HOT Lane Development (FHWA, 2003)
  16. ^ MTC Planning - HOV/HOT Lanes Retrieved October 6, 2009

External links[edit]