These lanes are there for everyone to use in the case of an emergency; as it is those lanes which will allow drivers enough room to move to the right to allow an emergency vehicle through. Grid locked streets without a means to allow emergency vehicles to pass, is poor planning therefore bike lanes are part of the long term solution. This message though communicated before, needed to be repeated as I believe it was one aspect that has been forgotten about in our conversations of government spending.
Below are drawings for Mount Vernon Rd with 11 ft lanes and 4 ft "bike lanes" and a foot and half gutter on each side for a total of 33 feet curb to curb.
A typical car or SUV is 7 to 8 feet wide. A fire truck needs about 10 feet for passage. So most places on these streets could conceivably allow for two cars and a fire truck side by side but the planned cross section would certainly allow for a fire truck to operate with a little more room which would likely benefit response time.