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Viewing report
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Impacts of Traffic Signal Control Strategies. Edition No. 1
VDM Publishing House, Dec 2008, Pages: 232
The LHOVRA is the predominant isolated
signal control strategy in Sweden. Past-end green
was originally incorporated as part of LHOVRA
(the “O” function) and was intended to reduce the
number of vehicles in the dilemma zone. Coordinated
signal control in Sweden is often fixed-time with
local vehicle actuated signal timing adjustments and
bus priority.
The aim was to evaluate the following
strategies using Stockholm as a case study:
1. The LHOVRA technique with a focus on the “O”
function;
2. Fixed time coordination (FTC);
3. Fixed time coordination with local signal
timing adjustment (FTC-LTA);
4. FTC-LTA as above + active bus priority
(PRIBUSS);
5. Self-optimizing control (SPOT).
Field measurements were used for study of driver
behavior and traffic impacts. VISSIM
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