But transit-oriented developments tend to have high rents, with 10 percent of units in projects of 10 units or more reserved for affordable housing. Ironically, developments intended to promote transit may be helping to increase average rents in already gentrifying neighborhoods, forcing lower-income people to less convenient city neighborhoods or to suburbs, where they are more dependent on cars. Some community advocates are asking the city to allot higher percentages of housing for low-income people.