| CHANGEABLE MESSAGE SIGNS |
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Legibility
Verbal (text)
Words used in messages
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CHANNELIZATION
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Left turns
Pedestrian refuge island
Right turns, 13-14
Systems (Devices) 1, 2
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Barricades, 1, 2
Chevron patterns, 1, 2
Concrete safety shaped barriers, 1, 2,
3
Cones, 1, 2
Drums, 1, 2
Lights (amber flashing/steady burn)
Side reflectors
Tubular markers, 1, 2,
3
Vertical panels, 1, 2
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| CONSTRUCTION/WORK ZONES |
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Background/scope of Handbook
Rationale and supporting evidence (by design element)
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Advance signing for lane choice
Channelization practices
Delineation, crossovers/alternate travel paths
Portable changeable (variable) message signing
Temporary pavement markings
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Recommendations (by design element)
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Advance signing for lane choice
Changeable (variable) message signing practices
Channelization practices
Delineation, crossovers/alternate travel paths
Lane closure/lane transition
Portable changeable (variable) message signing
Temporary pavement markings
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| CRASHES |
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Construction/work zone
Fixed lighting installations, 1, 2
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High mast
Interchange lighting
Street
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Horizontal curves
Interchange, 1, 2
Intersection, 1, 2,
3, 4
Left turn, 1, 2,
3, 4
Night, 1, 2
Pedestrian, 1, 2
Ramp/off ramps
Traffic control devices
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Pedestrian
Signs (one-way, stop, yield)
Traffic signals
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Vertical curves
Work zone location
Wrong way, 1, 2
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CREST VERTICAL CURVES
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Advance signing
Length
Stopping sight distance
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CURB RADIUS
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Definition, 1,2
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CURVES (see ROADWAY CURVATURE AND PASSING ZONES)
DELINEATION TREATMENTS
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Chevron panels, 1, 2
Conspicuity enhancing, 1, 2
Contrast requirements, 1, 2
Exit ramp gore delineation, 1, 2
Pavement markings, 1, 2,
3, 4, 5
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Contrast formula, 1
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Post-mounted delineators (PMD's), 1, 2,
3, 4
Raised pavement markers (RPM's), 1, 2,
3, 4
Stripes (painted), 1, 2
Temporary pavement markings
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GAP ACCEPTANCE
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Model, 1, 2
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HIGHWAY-RAIL GRADE CROSSINGS (PASSIVE)
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Background/scope of Handbook
Rationale and supporting evidence (passive crossing
control devices)
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Illumination at crossings
Rumble strips
Signing
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Advanced railroad crossing warning
Buckeye crossbuck
Canadian crossbuck
Conrail shield
Enhanced crossbuck
Look for trains
Parallel railroad advance warning
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Railroad advance warning
Yield to trains
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Vehicle-activated strobe light
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Recommendations (by design element)
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Passive crossing control devices
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INTERCHANGES (GRADE SEPARATION)
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Background/Scope of Handbook
Rationale and supporting evidence (by design element)
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Exit area
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Ramp gore delineation
Signing
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Decision sight distances
Fixed lighting installations
Lane design features
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Acceleration lane, 1, 2,
3
Deceleration lane, 1, 2,
3
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Pavement marking delineation
Post delineators, 1, 2
Raised pavement markings
Stopping sight distances
Traffic control devices, prohibited movements
on freeway ramps
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Recommendations (by design element)
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Exit area
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Signing
Ramp gore delineation
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Fixed lighting installations
Lane design features
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Acceleration lane
Deceleration lane
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Traffic control devices, prohibited movements
on freeway ramps
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| INTERSECTIONS (AT-GRADE) |
Background/scope of Handbook
Rationale and supporting evidence (by design element)
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Channelization
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Refuge islands
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Curb radius
Edge treatments/delineation of curbs, medians,
and obstacles
Fixed lighting installations
Intersecting angle (skew)
Intersection sight distance (sight triangle)
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No control (I)
Yield control (II)
Stop control (IIIA), 1, 2
Stop control--left turn (IIIB)
Stop control--right turn (IIIC)
Signal control (IV)
Stop control--vehicle turning left from
major highway (V)
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Lane assignment, devices on approach
Offset (single) left-turn lane geometry
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Wrong way maneuvers
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Pedestrian control devices
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Clearance interval
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Receiving lane (throat) width, turning operations
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Roundabouts
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Crash data, 1, 2
Design speed
Geometric features
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Circulatory roadway width
Central island
Entry width
Inscribed diameter
Roundabout ahead
Signing
Splitter islands
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Public opinion
Safety analysis
Use
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Signing
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One way
Stop-controlled intersection
Street name
Wrong way
Yield-controlled intersection
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Traffic control
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Left-turn movements, signalized intersections
Right-turn movements, signalized intersections
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Traffic signal performance
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Backplates
Color
Intensity levels
Intervals
Shape (circular)
Size
Standards
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Recommendations (by design element)
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Channelization
Curb radius
Edge treatments/delineation of curbs, medians,
and obstacles
Fixed lighting installations
Geometry, opposite (single) left-turn lane
Intersecting angle (skew)
Intersection sight distance (sight triangle)
Lane assignment, devices on approach
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Pavement (roadway) markings
Signs (regulatory, advisory)
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Opposite (single) left-turn lane geometry
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Wrong way maneuvers
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Pedestrian control devices
Receiving lane (throat) width, turning operations
Roundabouts
Sight distance (sight triangle)
Signing
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One way
Opposite (single) left-turn lane
Stop-controlled intersection
Wrong way
Yield-controlled intersection
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Traffic control
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Left-turn movements, signalized intersection
Right-turn movements, signalized intersection
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Traffic signal performance
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Distribution, horizontal, vertical
Intensity levels
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| LANE DESIGN (INTERCHANGES) |
Acceleration/deceleration lane, 1, 2
Decision sight distance
Stopping sight distance
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| LIGHTING |
Fixed lighting installations, 1, 2
Interchange, complete, partial, 1, 2
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| OLDER DRIVER DIMINISHED CAPABILITIES |
Angular motion sensitivity, 1, 2
Arthritis, 1, 2,
3
Attention, 1, 2
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Divided, 1, 2, 3
Selective
Switching
Visual
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Cognitive-motor processes, 1, 2
Comprehension, traffic signals
Curve handling, 1, 2
Dark adaptation
Decision time
Depth perception
Driver perception
Flexibility, head, neck, and other joints, 1,
2, 3, 4
Gap judgment, 1, 2,
3, 4, 5
Head and neck mobility, 1, 2,
3
Information processing, 1, 2,
3
Intersection negotiation, 1, 2,
3
Lane keeping, 1, 2
Left-turn operations, 1, 2,
3, 4, 5
Motion perception, 1, 2,
3, 4
Musculoskeletal factors, 1, 2
Ocular transmittance
Nighttime, 1, 2
Pavement marking following, 1, 2,
3, 4
Perception-reaction time, 1, 2
Reaction time, 1, 2,
3, 4
Reading street signs, 1, 2,
3
Right-turn operations
Sight distance
Sign and signal recognition, 1, 2
Traffic signal response, 1, 2
Vision/visibility difficulties, 1, 2,
3, 4, 5,
6, 7, 8,
9
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Contrast sensitivity, 1, 2
Useful-field-of-view, 1, 2,
3, 4
Visual acuity, 1, 2,
3, 4, 5,
6, 7, 8,
9
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Visual accommodation
Visual search patterns
Visual attention, 1, 2
Walking (intersection crossing)
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| PEDESTRIAN |
Control devices, 1, 2,
3, 4
Crossings
Crossing time
Crosswalk
Median refuge islands
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| PERCEPTION-REACTION TIME (PRT) |
Values, 1, 2,
3, 4
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| ROADWAY CURVATURE AND PASSING ZONES |
Background/scope of Handbook
Rationale and supporting evidence (by design element)
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Crest vertical curves
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Length
Advance signing for sight restricted locations
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Horizontal curves
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Pavement width
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Two-lane highways,
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Passing/overtaking lanes
Passing sight distance
Passing zone length
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Recommendations (by design element)
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Crest vertical curves
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Advance signing for sight-restricted locations
Length
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Horizontal curves
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Pavement markings and delineation
Pavement widths
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Two-lane highways
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Passing/overtaking lanes
Passing sight distance
Passing zone length
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| SIGHT DISTANCE |
Adequacy, 1, 2,
3
Alignment, horizontal, vertical, 1, 2
Intersection, 1, 2,
3
Left-turn lane offset
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| SIGNING |
Abbreviations
Advance signing for lane closure
Conspicuity
Construction/work zones
Divided highway, 1, 2,
3
Do not enter, 1, 2,
3
Don't walk
Exit
Freeway entrance
Horizontal curves
Interchange
Keep right unless overtaking
Lane-use control, 1, 2
Left turn
Left turn yield on green, 1, 2
Legibility distance, 1, 2,
3
Legibility index
Letter size requirements, 1, 2
Limited sight distance
Location
Look for turning vehicles
Next right
Nighttime legibility requirements
No passing zone
No turn on red, 1, 2
Overhead
One-way, 1, 2
Pedestrian
Retroreflectivity
Right-turn on red
Slow/hill blocks view, 1, 2
Stop, 1, 2,
3
Street name, 1, 2
Variable message
Vehicles entering, 1, 2
Vertical curves
Wrong way, 1, 2,
3, 4, 5
Yield, 1, 2,
3, 4
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| STOPPING SIGHT DISTANCE (SSD) |
Definition, 1, 2,
3
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| TRAFFIC CONTROL DEVICES |
Freeway ramps, 1, 2
prohibitive movement, 1, 2
Intersections, 1, 2
Pedestrian movement, 1, 2
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| TRAFFIC SIGNALS |
Intensity, signals, luminance, 1, 2
Left-turn movements, 1, 2
Left turn yield on green, 1, 2
Pedestrian, 1, 2
Right turn on red (RTOR), 1, 2
Signal head design
Standards, 1, 2
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VISIBILITY
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Channelization devices
Delineation, 1, 2
Night
Object/obstacle/obstruction
Pavement marking, 1, 2
Pedestrian
Roadway, 1, 2
Signs
Traffic Signals
Vehicle (conflict)
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