2026/27__Highway
Highway Capacity
Capacity
Manual
Manual
(HCM).pdf(questions
(HCM)(questions &&answers).!!!!(questions
answers).!!!!(questions
(questions
&&answers).!!!!
answers).!!!!
& answers).!!!!
Highway
Highway Capacity
Capacity Manual
Manual (HCM)(HCM) 2025/2026
Study online at https://quizlet.com/_i1ltq4
1. HCM Volume 1 Concepts for traffic operations, capacity, quality, and level of service.
2. HCM Volume 2 Uninterrupted Flow Facilities
(no stop signs, traffic signals, or other fixed location causes of delay/interruptions)
3. HCM Volume 3 Interrupted Flow Facilities
4. HCM Volume 4 Applications Guide
5. "Base Condi- - 12ft lane width
tions" - no heavy vehicles
- regular/familiar travelers
6. "BF&MH Seg- Exhibit 12-4
ment Capacity
Under Base Con-
ditions"
7. Freeway limited access, divided highway with at least two lanes in each direction
- traffic enters/exits at interchanges only
- always grade separated from intersecting crossroads
- always have a median to separate opposing traffic
8. Multilane High- two or more lanes in each direction
way - may be divided or undivided or TWLTL
- access is typically from at-grade intersections or driveway/commercial entrances
(or isolated interchange)
9. Undersaturated Unsaturated = desirable condition; traffic is unaffected by upstream/downstream
Flow vs bottlenecks
Oversaturated
Flow Oversaturated = undesirable condition; traffic is congested/queued by a bottle-
1/2
HighwayHighway
CapacityCapacity
Manual Manual
(HCM).pdf(questions
(HCM).pdf(questions
& answers).!!!!(questions
& answers).!!!!(questions
& answers).!!!!
& answers).!!!!
Page 1 of 2
Highway Capacity
Capacity
Manual
Manual
(HCM).pdf(questions
(HCM)(questions &&answers).!!!!(questions
answers).!!!!(questions
(questions
&&answers).!!!!
answers).!!!!
& answers).!!!!
Highway
Highway Capacity
Capacity Manual
Manual (HCM)(HCM) 2025/2026
Study online at https://quizlet.com/_i1ltq4
1. HCM Volume 1 Concepts for traffic operations, capacity, quality, and level of service.
2. HCM Volume 2 Uninterrupted Flow Facilities
(no stop signs, traffic signals, or other fixed location causes of delay/interruptions)
3. HCM Volume 3 Interrupted Flow Facilities
4. HCM Volume 4 Applications Guide
5. "Base Condi- - 12ft lane width
tions" - no heavy vehicles
- regular/familiar travelers
6. "BF&MH Seg- Exhibit 12-4
ment Capacity
Under Base Con-
ditions"
7. Freeway limited access, divided highway with at least two lanes in each direction
- traffic enters/exits at interchanges only
- always grade separated from intersecting crossroads
- always have a median to separate opposing traffic
8. Multilane High- two or more lanes in each direction
way - may be divided or undivided or TWLTL
- access is typically from at-grade intersections or driveway/commercial entrances
(or isolated interchange)
9. Undersaturated Unsaturated = desirable condition; traffic is unaffected by upstream/downstream
Flow vs bottlenecks
Oversaturated
Flow Oversaturated = undesirable condition; traffic is congested/queued by a bottle-
1/2
HighwayHighway
CapacityCapacity
Manual Manual
(HCM).pdf(questions
(HCM).pdf(questions
& answers).!!!!(questions
& answers).!!!!(questions
& answers).!!!!
& answers).!!!!
Page 1 of 2