Guidelines for Implementing Managed Lanes (2016) / Chapter Skim
Currently Skimming:
Pages 75-94
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 75... ...
75 Traffic Control Devices Overview Traffic control devices (TCDs) are an integral part of an overall communication plan to promote user understanding of routing and operations of managed lanes.
|
From page 76... ...
76 such pay-by-mail systems (issued November 2013)
|
From page 77... ...
77 A managed lane in the MUTCD is a type of preferential lane defined as follows: Managed Lane -- a highway lane or set of lanes, or a highway facility, for which variable operational strategies such as direction of travel, tolling, pricing, and/or vehicle type or occupancy requirements are implemented and managed in real-time in response to changing conditions (emphasis added)
|
From page 78... ...
78 as necessary for conspicuity for those road users with registered ETC accounts seeking such direction, as well as for those road users who do not have ETC accounts so that it is clear to them to avoid such direction when applicable.
|
From page 79... ...
79 The 2009 MUTCD assigned the color purple to be used on portions of signs that include information on the required ETC payment system. No sign shall ever contain a full purple background; the purple is always used as the background color for a section of the sign, or as the background color for an underlay panel to provide contrast and emphasis for ETC pictographs.
|
From page 80... ...
80 barrier can be used to visually separate managed lane signs from others. The best solution is to use separate sign structures staggered longitudinally so that each sign sequence on the left (managed)
|
From page 81... ...
81 Source: FHWA (1) , Figure 2G-24.
|
From page 82... ...
82 Preferential Lane Entrance Direction, and finally Preferential Lane Exit. Because regulatory and warning information is more critical to the road user than guidance information, regulatory and warning signing whose location is critical should be displayed rather than guide signing in cases where conflicts occur.
|
From page 83... ...
83 • Use of an exit destination sign well in advance of the entrance point can inform potential managed lane users in the general-purpose lanes which exits are served while also notifying drivers already in the managed lane of upcoming exit points. This is illustrated in Figure 69.
|
From page 84... ...
84 each access point. If drivers entered the lane by changing lanes to the left, then a right-exit flyover ramp might violate their expectation of how they will exit.
|
From page 85... ...
85 lanes and general-purpose lanes. CMSs on roadways with speed limits 55 mph or higher should be visible from 0.5 mi under both day and night conditions.
|
From page 86... ...
86 pricing signs to further inform the driver of the costs and benefits of using the managed lane. Research has shown an even split in driver understanding regardless of whether the toll price sign came before or after a comparative travel time sign (95)
|
From page 87... ...
87 concepts are applied, most employ the following devices at channelized high-speed ramps with general-purpose lanes: • Railroad gate arms of varying length to block off the ramp transition to the gore point. Placement is every 50 to 60 ft and usually involves a series of 4 to 10 gates depending on the length of the ramp taper (see Figure 73)
|
From page 88... ...
88 Contraflow Lanes As noted in the glossary, contraflow lanes borrow an offpeak direction lane on a controlled-access roadway and operate it in the peak direction during high-demand periods typically coinciding with the morning and afternoon peak hours. Contraflow lanes require a full complement of onsite operational staffing to safely separate the lane, usually employing either a movable barrier or pylons placed into predrilled holes in the pavement.
|
From page 89... ...
89 and may need to consider strategies such as rumble treatment that discourage motorists from crossing the marking if the lane is access restricted (see Figure 80 for example)
|
From page 90... ...
90 left to indicate opposing traffic depends on the direction of travel. MUTCD Figure 3D-1 is reproduced here as Figure 81 and illustrates the basic lane line color applications for reversible and non-reversible facilities.
|
From page 91... ...
91 Managed Lane Bypasses at a Toll Plaza Managed lanes are sometimes applied as peak-hour bypasses at toll plazas commonly leading to bridges or tunnels. Lanes approaching a toll plaza may be operated as HOV- or bus-only lanes or may be open to other vehicles with certain registered ETC accounts.
|
From page 92... ...
92 where the vehicles departing the toll plaza in the adjacent cash lanes have accelerated to 30 mph. Other Methods of Disseminating Information Traffic control devices should not be the only method of explaining operations, routing, and payment to drivers.
|
From page 93... ...
93 mentation is the addition of pricing to an HOV lane. Often, such conversions involve more than merely implementing toll gantries and supplemental signing.
|
From page 94... ...
94 erratic maneuvers that jeopardize safety and may also reduce the number of users. The application of additional traffic control devices often cannot correct a fundamentally bad design.
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.