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Table 4 LOS criteria for the urban street facility (HCM 2016)

From: Centrality-based lane interventions in road networks for improved level of service: the case of downtown Boise, Idaho

LOS

Travel speed threshold by base free-flow speed (mph)

55

50

45

40

35

30

25

A

> 44

> 40

> 36

> 32

> 28

> 24

> 20

B

> 37

> 34

> 30

> 27

> 23

> 20

> 17

C

> 28

> 25

> 23

> 20

> 18

> 15

> 13

D

> 22

> 20

> 18

> 16

> 14

> 12

> 10

E

> 17

> 15

> 14

> 12

> 11

> 9

> 8

F

≤ 17

≤ 15

≤ 14

≤ 12

≤ 11

≤ 9

≤ 8

F

Any