- Virginia Department of Transportation(VDOT). High Occupancy Vehicle (HOV) Systems -I-395 and I-95 Reversible Lanes. VDOT. 2011-08-30 [2012-04-25].
- High Occupancy Vehicle (HOV) Lanes - Rules and FAQs.
I'm pregnant. Do I count as one person or two? In the HOV world, you're one person. Babies of any age, however, count as a person.
- Entire length of DVP in Toronto using HOV lane on my motorcycle.
Toronto marked off the left lane of the 'Don Valley Parkway' highway for "High Occupancy Vehicles" (aka HOV) so only certain vehicles were allowed to use it.
- Carpool (HOV) Lanes. HybridCars.com. 2010-07-08 [2012-02-27].
- Eligible Vehicles - Single Occupant Carpool Lane Use Stickers. California Air Resources Board. 2012-04-12 [2012-04-16].
- Fact Sheets on Highway Provisions. [2008-04-13].