Title: Level of Service F for Grade A Streets
Track: Prosper
Format: 90 minute panel
Abstract: Relying solely on Level of Service criteria for street design, which evaluates vehicle congestion, leads to poor outcomes on many of our roadways. LOS F, far from a failure, creates opportunities to reallocate roadway space for more livable street designs. In this session, learn about projects in Cambridge and San Francisco that overcame opposition and generated community support in prioritizing better bicycling and walking over vehicle capacity during the peak hour of travel.
Presenters:
Presenter: Michael Sallaberry San Francisco Municipal Transportation Agency
Co-Presenter: Jeffrey Rosenblum City of Cambridge, MA
THE COUNTRY WHO SOLVED THE WORLD_HOW CHINA LAUNCHED THE CIVILIZATION REVOLUTI...
Level of Service F for Grade A Streets--Cesar Chavez Street
1. Cesar Chavez Street
Level of Service F for Grade A Streets
ProWalk ProBike ProPlace
Pittsburgh PA – Sept 2014
2. FHWA diagram
2
Road Diets
Excess capacity
removed, extra space
reallocated for other
purposes:
- Bike Lanes
- Wider Sidewalks
- Median/Pedestrian
Islands
San Francisco has 60+ road diets
3. Space is a Limited Resource
To be used Efficiently
4. 4
Road Diets
create space for
Complete
Streets, which
offer comfort
and enjoyment
of public space.
Other streets can
feel like:
5. SFMTA STRATEGIC PLAN GOALS
All Trips Today 2018 Goal
61% auto/39% non-auto 50% auto/50% non-auto
7. 7
Rules of Thumb
Two cut-offs for classic
4-to-3 road diet:
1) ~20,000 vehicles per day
2) ~1000 vehicles per hour per
direction
Also, peak hour volume is
approx 10% of ADT
ie. if pk hr = 800 vph, ADT ~8000vpd
8. 8
Successful
road diet in
1999 -
Create
success
stories!
Valencia Street
Initially installed as
trial due to concerns
24. 24
# of vehicles per hour
vehicles per hour
Designing for Peak Motor Vehicle Flow
Unused Capacity
Unused
Capacity
Peak Period
Level of Service “F”
Graphic by M Sallaberry
25. 25
Designing for Peak Hour
Inefficient Use of Valuable Space
Empty Lanes Encourage Speeding
Unnecessarily Wide for Pedestrians
*Peak hour occurs ~2hrs/day, 5 days/week, or 6% of the time
26. “This project will create congestion!”
26
There may be congestion during the peak
hour* but the benefits will be there 24
hours/day, 7 days/week.
*Peak hour occurs ~2hrs/day, 5 days/week, or ~6% of the time
27. Peak Traffic Volumes are Not a Given
If +/- 5% of peak hour traffic shifts in
27
some way – no more LOS problem!
Some drivers can:
- Travel at another time
- Take another route
- Consolidate trips or
not take the trip, esp
non-essential trips
- Use another mode
28. 28
Protect Neighboring Streets!
- Gather “before” volume-speed
data for baseline
- Anticipate cut-through
routes and proactively
address
Before – attractive to
cut through
After – raised xwalk,
bulbout/neckdown
29. 29
Benefits for Everyone
Pedestrians: Shorter crossings, fewer lanes to cross, wider
median refuges
Bicyclists: Striped space on road and slower speeds
Transit: Transit bulbs ease access to/from stops and reduce delay
Motorists: Speeds (and collisions) drop, turn lanes ease left
turns, easier to access parking with wider parking lane and bike
lane as buffer
Property Owners: increased housing value
All: Speeds (and thus, collisions) drop, more beautiful street
Other: higher efficiency lighting saves energy and costs,
landscaping reduces flooding and recharges groundwater
30. 30
Benefits for Pedestrians
Shorter crossings, fewer lanes to cross, wider median refuges
31. Shorter Crossing, Less Exposure
Crossings shortened from 80’ to 68’
Use newly available signal time to account for slower 31
pedestrians
AND to add green time for arterial, if needed
Before After
32. People on bikes
along CC up 250%
32
Benefits for Bicyclists
in 5 years!
Striped space on road and slower speeds
Separated bikeway considered but not chosen due to a number of
33. 33
Benefits for Transit
Transit Bulbs
• Shorter dwell time for transit
• More space for shelter and other street
furniture outside walking space
• More landscaping opportunities
• Reduces impact of congestion on transit
34. 34
Benefits for Motorists
Speeds (and collisions) drop, turn lanes and signal work ease left
turns, eased access to parking with wider parking lane and bike
lane as buffer, space for everyone = less stress
35. 35
More beautiful enjoyable
street, increase in
property value
Freeway approach, before-after
302 new
trees!
36. High efficiency lights save energy
and costs, landscaping reduces
flooding, recharges 36
groundwater
41. 41
Left Turns
Easier for motorists, where allowed.
More comfortable for pedestrians, where not allowed.
Left turns involved in many crashes with peds, so either
prohibit or design for them with signal phasing.
42. Road Diets can include conversion of
parking spaces to ped/bike uses
42
Parklets
43. 43
On-Street Bike Parking/Corrals
1 car space
=
10 to 12
bike
spaces
Clears
sidewalk
for peds
44. 44
The Biggest Road
Diet: Teardown of
The Embarcadero
Freeway