heavily used as a Park and Ride but is considered a transit center. Park and Ride expansion Spring Woods PR (date: TBD) Westgreen PR (date: TBD) Katy Mills PR (date: TBD) Advertising policy Metro has had a policy since its founding in which it refuses to place advertisements on buses, claiming that such a move would create an unsightly appearance on the buses. Metro had originally attempted to generate extra revenue by only advertising in its bus shelters, but a city ordinance blocked the decision. After a failed attempt to get permission to partially use advertisements on buses, Metro has since decided to continue enforcing its policy. Due to the lack of funding for METRORail expansion, the policy has been proposed to be expanded to light rail vehicles in order to generate additional revenue. Metro began advertising the Houston Zoo on the side of three light rail vehicles in 2010. In late September 2010, due to the decreased budget, Metro began to seriously consider advertising on their buses. Rates In the fall of 2006, Metro revealed plans to rework its fare system. The new system involves pre-paid fare cards (contactless smart cards), called Q Cards, that can be recharged on local buses and Metro TVMs. 3-hour passes are electronically added to the card each time it is used. Frequent users get "Rider Rewards" that offer five free rides for every 50 paid trips. Senior citizens 65–69 will continue to receive a discounted rate as will disabled patrons. Senior citizens over 70 may ride for free. Children under 5 also ride for free when accompanied by an adult (limit 3). This was intended to keep the base fare low and phase out the previous fare system consisting of transfers (was reinstated from July 2015 to March 2016), as well as day (reinstated on 7 Oct. 2013), weekly, monthly and annual passes, which occurred in early 2008. On November 2, 2008, local fares increased to $1.25 from $1. Currently another fare increase is being mulled as a means to pay for constructing the expansion of the light rail. HOV system Metro has been known for pioneering the use of express buses in HOV lanes. This was part of the reversible HOV lane concept that began in 1979 with the completion of the North Freeway (I-45) Contraflow Lane. This concept used the inside freeway lane of the "opposite" direction separated by traffic pylons