ST0402-CS041130Ke th Marvin - Fwd' I.H. 635 WBFR Extens on Home Depot Drive to Be t Line Road - Ge ometrics and Signals At Belt L~ge 1 ~
From: Ken Griffin
To: Keith Marvin
Date: 11/30/2004 9:47:28 AM
Subject: Fwd: I.H. 635 WBFR Extension: Home Depot Drive to Belt Line Road - Ge ometrics
and Signals At Belt Line
Keith
Here's the last info I had on the 635 WBFR at Beltline.
ken g
>>> Jim O'Connor <joconnor@ci.irvingtx.us> 11/10/2004 12:18:17 PM >>>
Weldon and Jason,
I have received your request for City comments regarding the geometrics and
traffic signals for the proposed frontage road improvements at the northeast
corner of the I.H. 635 at Belt Line Road interchange. Following are those
comments. These are preliminary and based on the schematic design that we
have seen to this point in time. They are also preliminary since this
intersection is located in the City of Coppell, although the City of Irving
is responsible for the maintenance of the traffic signals by Interlocal
Agreement; all comments will require coordination with the City of Coppell
staff.
1. The northeast corner intersection should include a turning lane and
"porkchop" traffic island to channelize the high volume traffic which
negotiates this acute-angle corner. The inside radius of the turning lane
should be R=140' which; with the 69deg central angle of this corner, the
tangent of the turning lane curve should be approximately 100' which yields
the radius of 140 feet mentioned.
2. The length of the deceleration lane for the right-turn should be as long
as possible, limited only by the location and geometry of the proposed
interior local street intersection with the frontage road currently shown to
be about 900 feet east of the east curb line of Belt Line Road (exact
location to be determined and approved by TxDOT and the City of Irving).
Turning traffic volumes at this corner are very high necessitating the
maximum amount of storage. The 150' long transition (45 mph design) for the
decel lane should begin 60 feet west of the west end of the curb return for
the outbound turning lane of the proposed local street east of Belt Line.
3. The City of Irving agrees to relocate, re-construct and improve, as
necessary, the traffic signal at the northeast corner of the proposed I.H.
635 WBFR and Belt Line Road. The signal will be located within the traffic
island mentioned in comment #1 above. This work will include installation
of conduits and loop detectors (unless video detection is to be used).
If you have any questions or comments, please let me know.
James E. O'Connor, P.E.
Senior Transportation Engineer
City of Irving, Texas
Voice: 972-721-2646
Fax: 972-721-3720
email: joconnor@ci.irving.tx.us