residents' minds, boost tourism industries in both cities and expand housing options. It would also allow for direct connection between Hong Kong and Dongguan. As the area in the proposed area is less developed, the cost in building the line is expected to be lower, with a feasibility study yet to be conducted. In addition to metro lines, 5 Pearl River Delta Rapid Transit lines connecting neighboring urban centers in the Pearl River Delta such as Dongguan, Huizhou, Foshan and Guangzhou, totaling , have also been revealed. In 2016, an even more ambitious masterplan, expanding the previously planned 20 lines to 32, was unveiled. The new plan envisions a subway network to be completed by 2030. This will allow for travel between the central and suburban districts to be shortened to 45 minutes and for public transit to make up more than 70% of all motorized trips in Shenzhen. Ridership Since the opening of the first phase in 2004, there has been a steady growth in passenger traffic. In 2009 and 2010, passenger traffic soared with major openings of new phase 2 lines, with a three-fold increase in passenger traffic in 2010. On 12 July 2019 it set a new record for its peak ridership at 6.63 million. July is the busiest month of the year for the Shenzhen Metro, accounting for 9.3% of annual passenger traffic, while January is the least busy month, accounting for only 6.7%. This is caused by Shenzhen's large migrant worker population. Fares and tickets Metro rides are priced according to distance travelled, and fares vary from 2 RMB to 14 RMB. Since December 2010 fares are based on a usage fee (2 RMB) + a distance fee. The distance fee is 1 RMB for each from to ; after that 1 RMB for each from to and finally 1 RMB for every over distance. For passengers who wish to ride on business coach in line 11, they have to pay 3 times the amount of price that calculated by the regulations above. Children under the height of or aged below 6 may ride for free when accompanied by an adult. The metro also offers free rides to senior citizens over the age of 65, the physically disabled and military personnel. Tickets for children between and , or aged between 6 and 14 years, or middle school students, are half priced. Metro fares can be