There are probably dozens of street names in Washington, DC which are incorrectly named in OSM. Many of these are due to faulty data from the Census Bureau. I have been editing some of these mistakes.

Examples:

• Olive Avenue NW fixed to Olive Street NW
• Dumbarton Avenue NW fixed to Dumbarton Street NW
• Small section of Ohio Drive SW fixed to 23rd Street SW (north of Independence Avenue SW)

A much bigger effort is needed. I will continue to work on some of these issue.