I continue to consider how the Highway Capacity Manual can be improved, particularly the interrupted flow portions of the manual. Following are links to this ongoing work.
"Some Recommendations for Chapters 19 and 31 - Signalized Intersection Methodologies". Presented to Signalized Intersection Subcommitee, January 2015, for consideration for the Highway Capacity Manual, 6th Edition.
Source: 4. transportation research-consulting\hcm\2015 updates
"The Signalized Intersection Method of the Highway Capacity Manual: A State of Crisis". Presented at the 2016 annual meeting of the Transportation Research. This paper identifies critical issues relating to the signalized intersection methodology of the Highway Capacity Manual. The paper also suggests a path forward to resolve these issues.
Source: 4. transportation research-consulting\2016 trb signals prototype paper
"Chapter 19 - Signalized Intersections - Prototype Chapter". Presented to Signalized Intersection Subcommittee, January 2016. Ideas for what a new chapter 19 could look like. Presentation slides.
Source: 4. transportation research-consulting\prototype chapter 19 hcm
Study of HCM green time estimation model for actuated control. [to be added]
Source: 4. transportation research-consulting\trb paper green time estimation 2020
Musings on HCM Signalized Intersection Chapter (August/October 2020)
"hcm signals concepts index and summary 2020.10.07"
"signalized intersection revision musing 2020.08.21"
"prototype_chapter_19_2020.10.05.pptx"
Source: 4. transportation research-consulting\hcm\signalized intersection chapters review
Studies of the Permitted LT models, new scenarios (in progress)
Scenario 4.3: Shared LT/TH lane opposed by TH lane
Scenario 4.4: Shared LT/TH lane opposed by shared LT/TH lane
Studies of predicted green time, actuated signal control model (in progress)
"Some Recommendations for Chapters 19 and 31 - Signalized Intersection Methodologies". Presented to Signalized Intersection Subcommitee, January 2015, for consideration for the Highway Capacity Manual, 6th Edition.
Source: 4. transportation research-consulting\hcm\2015 updates
"The Signalized Intersection Method of the Highway Capacity Manual: A State of Crisis". Presented at the 2016 annual meeting of the Transportation Research. This paper identifies critical issues relating to the signalized intersection methodology of the Highway Capacity Manual. The paper also suggests a path forward to resolve these issues.
Source: 4. transportation research-consulting\2016 trb signals prototype paper
"Chapter 19 - Signalized Intersections - Prototype Chapter". Presented to Signalized Intersection Subcommittee, January 2016. Ideas for what a new chapter 19 could look like. Presentation slides.
Source: 4. transportation research-consulting\prototype chapter 19 hcm
Study of HCM green time estimation model for actuated control. [to be added]
Source: 4. transportation research-consulting\trb paper green time estimation 2020
Musings on HCM Signalized Intersection Chapter (August/October 2020)
"hcm signals concepts index and summary 2020.10.07"
"signalized intersection revision musing 2020.08.21"
"prototype_chapter_19_2020.10.05.pptx"
Source: 4. transportation research-consulting\hcm\signalized intersection chapters review
Studies of the Permitted LT models, new scenarios (in progress)
Scenario 4.3: Shared LT/TH lane opposed by TH lane
Scenario 4.4: Shared LT/TH lane opposed by shared LT/TH lane
Studies of predicted green time, actuated signal control model (in progress)