Traffic Data on N. Stafford and N. Quincy
Please find attached (below) our most recent traffic data available for N Stafford St and N Quincy St.
On Stafford St we counted two locations in late 2011 – one south of 17th St N and one south of 21st St N.
These speeds are typical for a neighborhood street and don’t demonstrate a widespread problem. The speed data wouldn’t qualify Stafford St for any form of traffic calming. The street is heavily parked on one side and relatively narrow for two-way traffic, all of which already has a calming effect on speeds.
On Quincy we counted one site between 20th St N and 18th Rd N in the summer of 2011, just before school was let out for the year. We found the average speed of traffic to be 29 mph and the 85th-percentile speed to be 33 mph. The posted speed is 25 mph, and we already have narrow lanes, bike lanes, and electronic speed feedback signs that contribute to lowering traffic speeds. Quincy is a busy arterial street and will always be more challenging for those entering from driveways than a neighborhood street would be. Some possibilities for making this maneuver easier include backing into the parking lane adjacent to one’s driveway before entering traffic, or backing into one’s driveway in the first place so it’s possible to leave the driveway front-first. Because Quincy is an arterial street, homeowners on Quincy would be permitted to install a circular driveway under Arlington’s zoning code should they choose to do so.
Please feel free to contact me further with any questions or comments.
Thanks -
Dave Kirschner, P.E.
Arlington County Department of Environmental Services
Transportation Engineering & Operations
2100 Clarendon Blvd., Suite 900
Arlington, VA 22201
Phone 703-228-3726
Fax 703-228-3719
On Stafford St we counted two locations in late 2011 – one south of 17th St N and one south of 21st St N.
- At the 17th St count site, we found the average speed to be 24 mph and the 85th-percentile speed to be 29 mph. The 85th-percentile speed refers to the speed at which 85% of traffic is traveling at or below.
- At the 21st St count site, we also found the average speed to be 24 mph and the 85th-percentile speed to be 29 mph.
These speeds are typical for a neighborhood street and don’t demonstrate a widespread problem. The speed data wouldn’t qualify Stafford St for any form of traffic calming. The street is heavily parked on one side and relatively narrow for two-way traffic, all of which already has a calming effect on speeds.
On Quincy we counted one site between 20th St N and 18th Rd N in the summer of 2011, just before school was let out for the year. We found the average speed of traffic to be 29 mph and the 85th-percentile speed to be 33 mph. The posted speed is 25 mph, and we already have narrow lanes, bike lanes, and electronic speed feedback signs that contribute to lowering traffic speeds. Quincy is a busy arterial street and will always be more challenging for those entering from driveways than a neighborhood street would be. Some possibilities for making this maneuver easier include backing into the parking lane adjacent to one’s driveway before entering traffic, or backing into one’s driveway in the first place so it’s possible to leave the driveway front-first. Because Quincy is an arterial street, homeowners on Quincy would be permitted to install a circular driveway under Arlington’s zoning code should they choose to do so.
Please feel free to contact me further with any questions or comments.
Thanks -
Dave Kirschner, P.E.
Arlington County Department of Environmental Services
Transportation Engineering & Operations
2100 Clarendon Blvd., Suite 900
Arlington, VA 22201
Phone 703-228-3726
Fax 703-228-3719
| n_quincy_st_btwn_20th_st_n_and_18th_rd_n_transmittal.pdf |
| n_stafford_st_s_of_21st_st_n.pdf |
| n_stafford_st_s_of_17th_st_n.pdf |