Highway-Rail Grade Crossings - PowerPoint PPT Presentation

Loading...

PPT – Highway-Rail Grade Crossings PowerPoint presentation | free to download - id: 3b904c-ZGI4N



Loading


The Adobe Flash plugin is needed to view this content

Get the plugin now

View by Category
About This Presentation
Title:

Highway-Rail Grade Crossings

Description:

Highway-Rail Grade Crossings May 21, 2008 MTC Seminar on Rail Crossings Kevin Schumacher Rail Crossings Engineering Section California Public Utilities ... – PowerPoint PPT presentation

Number of Views:407
Avg rating:3.0/5.0
Slides: 61
Provided by: mtcCaGov
Learn more at: http://mtc.ca.gov
Category:

less

Write a Comment
User Comments (0)
Transcript and Presenter's Notes

Title: Highway-Rail Grade Crossings


1
Highway-Rail Grade Crossings
  • May 21, 2008
  • MTC Seminar on Rail Crossings
  • Kevin Schumacher
  • Rail Crossings Engineering Section
  • California Public Utilities Commission

2
The Conflict
3
CA Railroad Crossing Incidents
  • 2003 through 2007 Averages
  • 155 incidents/year
  • 33 fatalities/year
  • 57 injuries/year
  • Approx. 1 fatality and 2 injuries for every 5
    incidents
  • Potential for catastrophic consequences

4
How to Address
  • Closure or grade separation eliminates the hazard
  • Public Education and Law Enforcement
  • Particularly effective to address pedestrian
    safety
  • Engineering Roadway geometry, traffic control
    devices, etc.

5
CPUC Role Overview
  • Railroad Operations Safety
  • Railroad track, signaling, Haz. Mat., etc.
  • Works closely with Federal Railroad
    Administration
  • Rail Transit Safety
  • Includes BART, SF MUNI, Santa Clara VTA, etc.
  • Rail Crossings
  • Crossing project review and authorization
  • CEQA project review

6
CPUC Role Rail Crossings
  • CPUC authorization required for
  • Change in type of warning devices at public
    crossings
  • Road Modifications (widening, striping,
    sidewalks)
  • New crossings (at-grade and grade-separations)
  • Change in number of tracks
  • Authorization process
  • GO 88-B Staff authorization of modifications
  • Formal Commission authorization

7
CPUC General Orders
  • CPUC establishes General Orders specifying rules
    and regulations
  • GO 26-D Minimum Clearances
  • GO 72-B Crossing Surface Maintenance
  • GO 75-D Standard Warning Devices
  • GO 88-B Modification of Rail Crossings
  • GO 135 Blocked Crossings
  • GO 145 Crossings Exempt from Stop Reqs

8
Grade Crossing Safety Improvement Program
(Section 130)
  • Funds safety improvements to identified hazardous
    public at-grade railroad crossings
  • Funds all construction related costs
  • In some cases may fund preliminary engineering
  • Statewide priority list

9
Quiet Zones
  • CPUC Role in establishing a train horn ban
  • Approval required for modifications of crossings
    (Supplementary or Alternative Safety
    Measures)
  • Diagnostic Review at all crossings in corridor
  • Pedestrian-only and private crossings must be
    treated in accordance with the diagnostic team
    findings.

10
Diagnostic Review
  • Field review of crossing and proposed
    modifications
  • Knowledgeable representatives of parties of
    interest
  • Roadway Agency, Railroad, and CPUC
  • Evaluates conditions at crossing to make
    determinations or recommendations concerning
    safety needs

11
Design Elements
12
Signs and Markings
  • Railroad or transit agency physically maintains
    the CPUC Standard warning devices (e.g.
    Crossbuck, Flashers, Gates)
  • Maintenance costs often shared by public agency
  • Local agency / Roadway Authority All other
    signs, markings and traffic signals are placed
    and maintained by the roadway authority

13
Crossbuck
14
Placement of Crossbuck
  • Minimum standard warning device on each crossing
    approach
  • Passive device (not train activated)
  • Motorists must Yield to trains
  • Sight lines to approaching trains must be
    considered carefully

15
Retro-reflective
Standard 1 (old)
Standard 1-R (retroreflective)
16
FHWA Proposed Change STOP or YIELD signs
17
Private Crossing Sign
18
Flashers (Standard 8 / 8-A)
19
Flashers (Standard 8)
20
Placement of Flashers
  • Equivalent to STOP sign when activated driver
    may proceed if safe
  • Sufficient sight distances necessary
  • Might consider where trailer trucks present gate
    maintenance problems
  • Can provide additional pedestrian warning

21
Gates (Standard 9)
22
Gates (Standard 9-A)
23
Placement of Gates
  • Generally placed where trains travel at greater
    speeds and/or frequency
  • May increase visibility of the warning devices
  • Legally prohibits motorists from proceeding

24
Standard Warning Devices
  • Equivalent interpretation
  • Crossbuck YIELD sign
  • Activated Flashers STOP sign
  • Activated Gates Solid Red Traffic Signal
  • If sight lines to an approaching train are
    insufficient, automatic gates are needed

25
Urban Concerns
  • Queuing
  • Gate Drive Around
  • Pedestrians

26
Queuing
27
Field vs. Office
  • Railroad crossing queues are best observed in the
    field
  • Traffic simulation and modeling can be misleading
    in the vicinity of crossings
  • Queues that build up during the passage of one
    train may not dissipate prior to arrival of a
    second train

28
Clear Storage Distance
29
Addressing Queuing
  • Traffic signals
  • Pre-signals / Queue Cutter
  • DO NOT STOP ON TRACKS sign
  • Hatch / KEEP CLEAR markings
  • Temporary Traffic Control Zones
  • Relocate the sources of queuing (driveway, bus
    stop, etc.)

30
Signalization of Intersections Near Crossings
  • Roadway intersections near crossings present
    special condition where traffic signals should be
    considered
  • Particular concern where STOP sign requires
    vehicles to queue or stop on track
  • Installation of traffic signal may be the best
    solution to clear motorists from the rail
    crossing
  • FHWA has proposed Warrant 9

31
Traffic Signals Near Crossing
  • Railroad preemption generally provided if queuing
    extends to the rail crossing
  • May be necessary even if gt 200 feet away
  • Track clearance green moves vehicles off
    tracks. Appropriate duration must be determined
    by the local agency.
  • Consider pedestrian clearance
  • Should prohibit movements toward track during
    railroad preemption
  • Avoid all-red-flash

32
DO NOT STOP ON TRACKS Signs
  • Should be placed when engineering judgment
    determines that potential for vehicle stopping on
    the tracks is high
  • Can be placed on curb and median (or both), near
    or far side of track (or both)

33
KEEP CLEAR / Cross-Hatch
34
Pre-Signal and Hatch Markings
35
Other Queuing Concerns
  • Driveways
  • Parallel Parking
  • Loading
  • Pedestrian traffic
  • Another railroad crossing
  • Construction Zone
  • Bus Stop

36
Temporary Traffic Control
  • Construction zones near crossing must avoid
    queuing on the track
  • Flagger may be required
  • MUTCD Figure 6H-46
  • GO 72-B

37
Bus Stops
38
Urban Concerns
  • Queuing
  • Gate Drive Around
  • Pedestrians

39
Gate Drive-around
40
Medians
  • Often placed with gates to provide gated
    channelized design
  • Discourages gate drive-around violations
  • Inexpensive compared to additional warning
    devices (such as exit gates)
  • Recommended min. 100-foot length
  • May allow median warning devices

41
Raised Median
42
Median Delineators
43
Left-turn past gate arm
44
Exit Gates (Standard 9-E)
45
Exit Gates
46
Turn Restrictions During Preemption
47
Urban Concerns
  • Queuing
  • Gate Drive Around
  • Pedestrians

48
Pedestrians
49
Pedestrian Crossings
  • Pedestrians will take most direct route
  • Need to channelize (fencing, barriers)
  • Consider additional warning devices in
    off-quadrant
  • Audible warning is essential
  • ADA requirements
  • Pedestrian crossing incidents often involve a
    second train

50
Gated Channelized
  • Pedestrian gates across pathway
  • Swing gates for emergency exit
  • Fencing for channelizing pedestrians to safe
    crossing location
  • Alternative Combination of swing gates and
    flashers

51
Gated Channelized
52
Gated Channelized
53
Swing gates Flashers
54
Channelization Flashers
55
ADA Requirements
  • Detectable warning consisting of raised truncated
    domes provides warning to visually impaired
    individuals of the presence of a crossing (street
    or rail).
  • Kickplates to assist individuals in wheelchairs
    to open swing gates.

56
Detectable Warning
57
Kickplates
58
A Few Closing Reminders
  • Maintain signage and markings
  • Ensure visibility of traffic control devices
  • Vegetation, clutter, parking, traffic parallel to
    track
  • Avoid confusion or conflict
  • Cantilever near traffic signals, STOP sign with
    DO NOT STOP ON TRACKS, right turn at pre-signal
  • Trucks often present the worst case
  • Turn radius, vertical profile, length,
    acceleration and braking, broken gate arms,
    clearance from curb, visibility, hazardous
    materials

59
Guidance Documents
  • FHWA Railroad-Highway Grade Crossing Handbook
    Revised Second Edition, August 2007
  • (FHWA Handbook)
  • FHWA Technical Working Group Guidance on Traffic
    Control Devices at Highway-Rail Grade Crossings,
    2002 (TWG Guidance)
  • AASHTO Policy on Geometric Design of Highways and
    Streets (Green Book)
  • TCRP Report 17 Integration of Light Rail Transit
    Into City Streets
  • TCRP Report 69 Light Rail Service Pedestrian
    and Vehicular Safety

60
Contact Info
  • Kevin Schumacher
  • shk_at_cpuc.ca.gov
  • (415)703-1208
  • http//www.cpuc.ca.gov/crossings
About PowerShow.com