[TCUG] Re: MOVA question
- From: "Stewart, Ian (ENV)" <Ian.Stewart@xxxxxxxxxxxxxxxxxx>
- To: "'tcug@xxxxxxxxxxxxx'" <tcug@xxxxxxxxxxxxx>
- Date: Fri, 22 Oct 2004 09:22:18 +0100
Shirley,
Does the right turn lane receive green at the same time as the ahead
movement, and is unopposed? If so, there is no need to 'sink' any traffic
from your long lane to account for the right turn, optimising the green
simply on the existing X loop. If the right turn is opposed or separately
signalled, there is a difficulty. My solution would be to accept gaps in
the ahead lane will reduce the green efficiency, (the actual traffic case)
and simply have a separate right turn lane optimised with it's own X loop
which does NOT sink the ahead.
Ian M. Stewart, Lancashire.
-----Original Message-----
From: shirleyreynolds@xxxxxxxxxxxxxxxxxxx
[mailto:shirleyreynolds@xxxxxxxxxxxxxxxxxxx]
Sent: 22 October 2004 09:09
To: tcug@xxxxxxxxxxxxx
Subject: [TCUG] MOVA question
Dear fellow MOVA users
I've got a poser for you!
I'm trying to work out how to code the detector data for the following
situation:
Single lane approach to signals widens to two lanes just 28 metres from the
stopline. There is one lane for aheads and one lane for right turners only.
Vehicles wishing to turn left have to use a free left slip lane just 10
metres from the stop line. I have placed an IN loop at 101 metres, an X
loop at 39 metres (before the single lane widens to 2 lanes) and an X-sink
loop on the left slip. Originally I had an X loop on the short right turn
lane to act as an X-sink for the ahead lane, but cannot see how to
accommodate the two X-sinks for the ahead lane.
Can I put a X loop at 25 metres from the stopline on the ahead lane to act
as the X-sink for the right turn lane, and use the left slip as a X-sink
for the ahead lane? The flows are fairly well balanced for all three
manoeuvres and none are insignificant.
Many thanks
Shirley Reynolds
Warwickshire County Council
(01926) 412733
PS When is Tony Sharp coming back from his holiday!
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