MA1006-CS140430
Michelle Matunas
From:Blair Baker <blairb@texasaccess.com>
Sent:Wednesday, April 30, 2014 4:26 PM
To:George Marshall
Subject:RE: Belt Line & MacArthur
I understand. And I know of nothing that would prevent this layout, where you have a jog, or bend, in the crosswalk
marking going in a slightly different direction. There is nothing that states that the crosswalk marking has to be in a
perfectly straight line across the intersection connecting with the sides of curb ramps.
Once a pedestrian has wheeled down to the refuge area at the bottom of the curb ramps, the symmetry and direction of
the contrasting pavers will give a visually impaired pedestrian an idea of which direction to travel across the intersection.
I assume that these curb ramps will not have flared sides. If so, then there could be a problem with not including 24 inch
segments within the markings as per the illustration.
Blair
From: George Marshall \[mailto:GMarshall@coppelltx.gov\]
Sent: Wednesday, April 30, 2014 4:04 PM
To: Blair Baker
Subject: RE: Belt Line & MacArthur
OK, to be clear I want to verify that the layout below where the dark black lines are the pavement markings (crosswalk &
stop bars) this would be legal. I know there are not any dimensions but basically each crosswalk is 15’ wide so that can
give a prospective on the size. The South west corner (bottom left) is the area of concern. The ramps will be blended
transitions just like the other 2 intersection projects you have reviewed for us.
Thank You, George
1
2
George Marshall
Traffic Engineer
Engineering Department
City of Coppell, TX
www.coppelltx.gov
972-304-3562 (office)
469-964-4731 (cell)
Please take our customer service survey
From: Blair Baker \[mailto:blairb@texasaccess.com\]
Sent: Wednesday, April 30, 2014 10:41 AM
To: George Marshall
Subject: RE: Belt Line & MacArthur
Hey George,
There is nothing I am aware of that would prevent you from extending the markings to include a diagonal or corner type
curb ramp. In fact, it would be required in order to meet the requirements in 406.6, specifically…
That the bottom of the curb ramp have a clear space of 48 inches minimum outside active traffic lanes of the
roadway, and
At diagonal curb ramps provided at marked crossings the 48 inches minimum clear space must be within the
markings.
406.6 Diagonal Curb Ramps. Diagonal or corner type curb ramps with returned curbs or other well- defined edges
shall have the edges parallel to the direction of pedestrian flow. The bottom of diagonal curb ramps shall have a clear
space 48 inches (1220 mm) minimum outside active traffic lanes of the roadway. Diagonal curb ramps provided at
marked crossings shall provide the 48 inches (1220 mm) minimum clear space within the markings. Diagonal curb ramps
with flared sides shall have a segment of curb 24 inches (610 mm) long minimum located on each side of the curb ramp
and within the marked crossing.
3
Figure 406.6 Diagonal or Corner Type Curb Ramps
Please email or call with any questions. Thank You!
Blair
Texas Access
Serving the Greater Areas of: Dallas/Fort Worth-San Antonio-Austin-Houston/Galveston
Blair Baker (TDLR RAS Lic. #0019)
3415 Misty Meadow Dr. | Dallas, Texas 75287-6025
Toll Free Voice & eFax: 1+ (800) 880-6986 | Direct: (972) 306-2800 | Cell: (214) 642-2559
eMail: BlairB@TexasAccess.com | Web: www.TexasAccess.com
From: George Marshall \[mailto:GMarshall@coppelltx.gov\]
Sent: Wednesday, April 30, 2014 9:34 AM
To: Blair Baker <blairb@texasaccess.com> (blairb@texasaccess.com)
Subject: Belt Line & MacArthur
Blair,
I am working on an intersection project and ran into a bit of a road block. As currently laid out my crosswalk markings
on the SW corner don’t line up with a ramp. Do you know if it is acceptable to transition the marking say from the brick
pavers? Please ignore the exact ramp layout as what is shown is existing and we will replace with something that fits the
dimensions of the crosswalk. Once I get further in the design I will submit for plan review.
Thank You, George
4
George Marshall
Traffic Engineer
Engineering Department
City of Coppell, TX
www.coppelltx.gov
972-304-3562 (office)
469-964-4731 (cell)
Please take our customer service survey
5