Governor favors linking rate to cost of road work Maryland's gasoline tax would go up in 18 months -- and possibly sooner -- if Gov. Martin O'Malley's plan to add $400 million a year in transportation funding is approved by the General Assembly. Although an immediate increase in the gas tax is not part of the $2 billion revenue plan the Democratic governor has been rolling out over the past week, he said Monday that he will push to tie future increases to the rising cost of road and bridge construction materials. At present rates of inflation, that would average...