With the cost of land so high along the Gold Coast, state lawmakers say they don't consider widening the highway to be fiscally feasible, although occasional stretches between entrances and nearby exits are now sometimes connected with a fourth "operational improvement" lane (for instance, westbound between the Exit 10 interchange in Darien and Exit 8 in Stamford). Expect similar added lanes in Darien and elsewhere in the Fairfield County portion of the highway in the future, lawmakers and state Department of Transportation officials say.