Evaluating Alternative Operations Strategies to Improve Travel Time ...
Evaluating Alternative Operations Strategies to Improve Travel Time ...
Evaluating Alternative Operations Strategies to Improve Travel Time ...
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SHRP 2 L11: Final Report<br />
Table 6.8 Level 2 <strong>Strategies</strong> (Delay Reduction of up <strong>to</strong> 20%)<br />
Category Strategy Treatments<br />
2.Information<br />
Collection and<br />
Dissemination<br />
5.<br />
Infrastructure<br />
<strong>Improve</strong>ments<br />
and Demand<br />
Optimization<br />
2.1.Surveillance<br />
and Detection<br />
2.4.Real-time<br />
Information<br />
2.5.Roadside<br />
Messages<br />
5.1.Geometric<br />
Design<br />
Treatments<br />
5.3.Signal<br />
Timing/ ITS<br />
5.4.Traffic<br />
Demand<br />
Metering<br />
Remote<br />
Verification<br />
(CCTV)<br />
Pre-trip<br />
information by<br />
511, web sites,<br />
subscription<br />
alerts, radio<br />
Road Weather<br />
Information<br />
Systems<br />
(RWIS)<br />
<strong>Travel</strong> <strong>Time</strong><br />
Message<br />
Signs for<br />
<strong>Travel</strong>ers<br />
(DMS & VMS)<br />
Bottleneck<br />
Removal<br />
(Weaving,<br />
Alignment)<br />
Signal<br />
Retiming/<br />
Optimization<br />
Advanced<br />
Transportation<br />
Au<strong>to</strong>mation<br />
Systems,<br />
Signal Priority<br />
and AVL<br />
Ramp<br />
Metering,<br />
Ramp Closure<br />
Application <strong>to</strong><br />
Sources of<br />
Congestion<br />
Traffic Control<br />
Devices,<br />
Special<br />
Events,<br />
Weather,<br />
Traffic<br />
Incidents<br />
Traffic Control<br />
Devices,<br />
Special<br />
Events,<br />
Weather, Work<br />
Zones, Traffic<br />
Incidents<br />
Weather<br />
All<br />
Physical<br />
Bottlenecks<br />
Traffic Control<br />
Devices<br />
Traffic Control<br />
Devices<br />
All<br />
Key<br />
Quantitative<br />
Benefits<br />
5% reduction in<br />
travel times in<br />
non-recurring<br />
congestion and<br />
overall 18%<br />
reduction in<br />
travel times.<br />
Potential<br />
reduction in<br />
travel time from<br />
5% <strong>to</strong> 20%.<br />
Reduces delays<br />
by up <strong>to</strong> 12%.<br />
improve trip time<br />
reliability with<br />
delay reductions<br />
ranging from 1 <strong>to</strong><br />
22 percent.<br />
Reduces travel<br />
time by 5% <strong>to</strong><br />
15%.<br />
Traffic signal<br />
retiming<br />
programs<br />
resulted in travel<br />
time and delay<br />
reductions of 5 <strong>to</strong><br />
20 percent.<br />
Reduces transit<br />
delays by 12 <strong>to</strong><br />
21%.<br />
A study<br />
regarding the use<br />
of ramp meters in<br />
North America<br />
found that the<br />
mainline peak<br />
period flows<br />
increased 2% <strong>to</strong><br />
14% due <strong>to</strong> onramp<br />
metering.<br />
Overall<br />
Cost<br />
Range*<br />
Effectiveness-<br />
Cost Rank<br />
Medium 2-C<br />
Variabl<br />
e<br />
Low-<br />
Medium<br />
2-E<br />
2-B<br />
High 2-F<br />
Medium<br />
-High<br />
2-D<br />
Low 2-A<br />
Low-<br />
Medium<br />
Low-<br />
Medium<br />
2-B<br />
2-B<br />
5.6. Congestion<br />
Pricing<br />
Cordon Pricing<br />
(Area wide)<br />
Physical<br />
Bottlenecks,<br />
Fluctuation in<br />
Normal Traffic,<br />
Special Events<br />
Congestion<br />
pricing in London<br />
decreased inner<br />
city traffic by<br />
about 20%.<br />
Low-<br />
Medium<br />
2-B<br />
OPERATIONS STRATEGIES AND TREATMENTS TO IMPROVE TRAVEL-TIME RELIABILITY Page 82
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