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Sub-problem 1b - Page 3 of 9

ID# C201B03

Sub-problem 1b: Maxwell Drive PM Peak Hour - With Conditions

HCM Planning Method
In the case of the HCM planning method, we need to supply the intersecting volumes, the left-turn treatment (protected, permissive, compound, etc.), the number of lanes (left, through, and right; the model decides if theyíre shared), the peak hour factor, the minimum and maximum cycle lengths, the coordination situation (yes or no), and whether parking is present. The model determines whether the configuration will work, reports the capacity condition (above capacity, at, nearly at, below, etc.), and presents a phasing plan.

For the Maxwell Drive, with the new site-generated traffic, Exhibit 2-15 presents the planning analysis results of nine model scenarios. Some show solutions that might be implemented in the field. Others show how the model thinks. In all scenarios, the peak hour factor is 0.94, the lost time per movement is 4 seconds (this is firm), there isnít any coordination, there arenít any parking maneuvers, the minimum cycle length is 10 seconds, and the maximum cycle length is 200 seconds. You can see the input data for Scenario P-1 in Dataset 9.
Exhibit 2-15. Maxwell Drive Results from Nine Planning Model Scenarios

Scenario

Number of Legs

Left Turns

Capacity Condition

Cycle Length

East

West

North

South

LT

TH

RT

LT

TH

RT

LT

TH

RT

LT

TH

RT

P-1

1

2

0

1

2

0

1

1

1

1

1

1

Prot

At

171.4

P-2

1

2

0

1

2

0

1

3

1

1

3

1

Prot

At

171.4

P-3

1

2

1

1

2

1

2

1

Prot

At

104.5

P-4

1

2

0

1

2

0

1

1

1

1

1

1

Perm

At

18.5

P-5

1

2

0

1

2

0

1

1

1

1

1

1

Perm

Under

80.0

P-6

1

2

0

1

2

0

2

1

1

2

1

1

Prot

At

76.5

P-7

2

3

0

2

3

0

2

1

1

2

1

1

Prot

At

38.5

P-8

2

3

0

2

3

0

2

1

1

2

1

1

Prot

Near

45.0

P-9

2

3

0

2

3

0

1

1

1

1

1

1

Prot

At

53.5

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