Which stretches of highway make you grind your teeth, day in and day out? Four times a year, the Baltimore Metropolitan Council, which advises local governments, crowns the region's Top 10 traffic bottlenecks. It uses a formula that takes the number of backups, their average duration and average length. The culprits haven't changed much since 2008.
MD 295 northbound at MD 175Between 4 p.m. and 5 p.m., northbound Baltimore-Washington Parkway stacks up as employees at Fort Meade and the National Security Agency head for home on MD 175. They run smack into co-workers who used MD 32 to access the parkway. The resulting weaving and merging can cause a 10-mile backup. During the fourth quarter of 2012, the bottleneck developed on 118 weekdays.