The Clean Air Act was created to respond to the ever-increasing air pollution that has come from industrial expansion and a reliance on fossil fuels for energy and transportation. Automobiles are a major source of air pollution (e.g. hydrocarbons, nitrogen oxides and carbon monoxide). It is estimated that road traffic accounts for about 40 percent of the pollution that contributes to ground-level ozone (the main ingredient in smog).

Single occupancy vehicles have long dominated the roadways, especially for commuters. In an effort to reduce pollution, states, like Massachusetts, have adopted Rideshare Programs. Ridesharing is the sharing of vehicles by passengers to reduce vehicle trips, traffic congestion and automobile emissions. Ridesharing (carpooling, vanpooling, public transport), as well as bicycle commuting and walking, are all goals of these programs.

Locally, the idea has been for Massachusetts Department of Environmental Protection (MassDEP) to work with large employers (with more than 1,000 employees) to promote commuting options. The program depends on corporate surveys of worker commuter patterns, providing a menu of commuting options, offering incentives, and documenting the resulting annual changes in patterns, hopefully to successfully meet a specific performance goal of reducing by 25 percent the number of times commuters drive alone to work.

Unfortunately, for various reasons, these programs have had limited success, but continue to burden the employer with annual compliance costs. Part of the problem has always been the difficulty of organizing car-pooling and the uncertainties due to the drivers’ and passengers’ daily schedules.

We are all getting accustomed to technology searching for logistical problems to solve. The ridesharing conundrum is one of those problems and “real-time ridesharing” are the solutions beginning to be provided by Transportation Network Companies, such as Lyft,  Uber and Sidecar. These companies, with their mobile apps, arrange one-time rides on an on-demand basis.

Both Lyft (Lyft Line) and Uber have now introduced a carpooling service in Boston. Passengers along a route get in the car at a price cheaper than the ride-for-hire alternative. The trip has to maintain its original route as it picks up other customers, who have to be ready immediately to get in the car when it arrives for them.

Although this service is currently limited to the Boston/Cambridge market, there is no question that an expansion of this service into the suburban market is inevitable.

It is also not very difficult to foresee an app that allows single occupancy drivers to easily connect with fellow commuters heading in the same direction, on a ride by ride basis. With no long-term commitments and many scheduling alternatives available, it seems like an easy fix. Yeah, we’ve got an app for that!