For several years, transit experts have been pressing for enhanced bus service.

The project had ballooned in cost to more than $5 billion and had been attacked by some politicians, transit experts and neighborhood groups.

Some transit experts in Houston went further.

It exists only on paper, and many transit experts say it is not needed.

For sometimes contradictory reasons, transit experts say yes.

With ridership increasing, many transit experts say the city's transit system will need major investments in equipment and services to keep pace.

For years, the story of the El has been one of too little money and costly patchwork maintenance, transit experts say.

Even then, transit experts and others discount the impact ferry service would have on commuter congestion.

The trend has raised concerns among some transit experts that service improvements achieved over the last decade may be difficult to sustain.

Another major subway construction project was given higher priority, and more financial backing, than many transit experts outside the M.T.A. had expected.