Cities Index.
Attachment A - Conceptual Design Alternatives

Palo Alto City Council
December 1, 2025

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Attachment A - Conceptual Design Alternatives
Meeting
December 1, 2025
Body
Palo Alto City Council
Original file
6.5 MB
Text extracted from the city's file for reading and search. Open the original on cityofpaloalto.primegov.com. That file is the official record.

Caltrain Ave Caltrain
California
++•Q+0
Meadow Dr _oma veroe Ave t Page Mill Rd California Ave
Pedestian Grossing:

Existing Path to Coltrain Statior
Now Bike Ramp

ARE APPROXIMATE
*ALL DIMENSIONS AND DISTANCES
concepts have been decided.
be needed once locations and basic design
Podestrian Crossings
Now High Visibility engagement and technical design work will New Bulb-out Curb refinement. Additional community
All concepts are flexible and subject to
and intended for discussion purposes only.

Now Sidewall Draft design concepts shown are preliminary Current Crossing Locations
Install Pedestrian Hybrid Beacon
San Antonio Bridge Enhancements (Draft) Ferne Ave Tunnel (Draft) Ely Pl Tunnel (Draft) Lindero Dr Tunnel with Alma St Signal (Draft) Locations of Crossing Alternatives A tornativo H Alternative G: Alternative F: Alternative E:

TRAFFIC SIGNAL
Park Bled Intersection RIGHT IN/RIGHT OUT DRIVEWAY
Enhance Existing On Street Parking Remo
New High Visibity
Off Street Parking Removal JEW CINEMAIK

PARKING REMOVAL
STAIRS

BOLLARD

OTENTIAL PARCEL IMPACTS
New Bulb-out Curb -
New Bulb-out Curb: PARCEL IMPACTS

AT GRADE PATH
Pedestrian Cross
'UNNEL
Driveway
Right In/ Right Cut RAMP AND/OR STAIR STRUCTURE
Parking Removel-
lew Traffic Sial
Realign Alma Street High Visibilty CALTRAIN RIGHT OF WAY Richt In /Richt Out
Driveway CITY LIMITS
Right In/Right Out Driveway
Right In/Right Out
New Sidewalk
LEGEND
Lindero Dr Tunnel (Draft) Loma Verde Ave Tunnel w/ Alma St Signal (Draft) Loma Verde Ave Tunnel (Draft) El Dorado Ave Tunnel (Draft) Alternative D: Alternative C: Alternative B: Alternative A:

PALO ALTO Concept Design Alternatives (Draft)

CITY OF

CITY OF
Alternative A: El Dorado Ave Tunnel (Draft)

PALO ALTO
Realign Alma Street
New
High Visibility
New Traffic Signal Pedestrian
Crossings

ALMA ST
N
2 WDE RAMP
(15.5' MDE STRUCTURE) (15 5* WOE STRUCTURE)
Example Stairway Leading to Undercrossing Example 12' Wide Ramp at 7% Grade Parallel (Homer Tunnel in Palo Alto) to Caltrain Tracks
New Bulb-out Curb
LEGEND Top of Rail

CALTRAIN RIGHT OF WAY

RAMP AND/OR STAIR STRUCTURE
(15.5' WIDE
STRUCTURE TUNNEL = 110FT

AT GRADE PATH

PARCEL IMPACTS
BOLLARD 10' 12'
STAIRS
Off Street Parking Removal

TRAFFIC SIGNAL
On Street Parking Removal

PARK BLVD
* ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

Section Through Tunnel Example 20' Wide and 10' High Tunnel 'San Antonio Caltrain Station in Mountain View)
Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative B: Loma Verde Ave Tunnel (Draft)

PALO ALTO
New High Visibility
Pedestrian Crossing
New Sidewalk
Right In/Right Out 15.5

8.25' 8.25'
Driveway Right In/Right Out Sidewalk Lane Lane Sidewalk T Driveway
Right In/Right Out Ped/Bike
Driveway STRUCK Ramp
Parking Removal. MADE RAMP LOMA VERDE AVE
Right In/Right Out
New Sidewalk Driveway
Parking Removal
Example 12' Wide Ramp at 7% Grade Section Through Loma Verde Ave

ALMA ST
Perpendicular to Caltrain Tracks
LEGEND Top of Rail

CALTRAIN RIGHT OF WAY

RAMP AND/OR STAIR STRUCTURE
TUNNEL = 220 FT

PARCEL IMPACTS

STRUCTURE) POTENTIAL PARCEL IMPACTE
BOLLARD 10' 12'
STAIRS
PARKING REMOVAL APPROX. 10 SPACES
Enhance Existing
Margarita Ave/ NEW SIDEWALK
Park Blvd Intersection RIGHT IN/RIGHT OUT DRIVEWAY
• ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

PARK BLVD TAKE TO MART BORE RS: 100 T Section Through Tunnel Example of Switchback Ramp Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative C: Loma Verde Ave Tunnel with Alma St Signal (Draft)

PALO ALTO
New High Visibility
Pedestrian Crossings
New Traffic Signal Realign Alma Street.

ALMA ST

NOT DAYD
(15.5 WIDE STRUCTURE).

Example Stairway Leading to Undercrossing Example 12' Wide Ramp at 7% Grade Parallel New Bulb-out Curb - (Homer Tunnel in Palo Alto)
to Caltrain Tracks
2° WIDE RAMP LEGEND
STRUCTURE).

CALTRAIN RIGHT OF WAY

RAMP AND/OR STAIR STRUCTURE
TUNNEL - 110 FT

AI GRADE PAIM

PARCEL IMPACTS
83033090303 POTENTIAL PARCEL IMPACTS
MIlI PARK BLVD

BOLLARD
STAIRS
Enhance Existing
Margarita Ave/ TRAFFIC SIGNAL
Park Blvd Intersection
• ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE,
MARGARITA AVE Section Through Tunnel Example 20' Wide and 10' High Tunnel BRANG TO NEAT HORN ROSEN - 100 'San Antonio Caltrain Station in Mountain View) Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative D: Lindero Dr Tunnel (Draft)

PALO ALTO

15.5'
Sidewalk Alma St

LINDERO DR
Extend Driveway
Ped/Bike
Ramp
New Sidewalk
New Sidewalk
Realign Intersection
New High Visibility
Pedestrian Crossing
Example 12' Wide Ramp at 7% Grade Section at 12' Wide Ramp to Tunnel
* MnE RAMD
LEGEND Top of Rail

CALTRAIN RIGHT OF WAY

RAMP AND/OR STAIR STRUCTURE
TUNNEL = 160 FT

PARCEL IMPACTS

POTENTIAL PARCEL IMPACTS

BOLLARD
STAIRS

PARK BLVD
• ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

New High Visibility
Pedestrian Crossing
ROBLES PARK Section Through Tunnel Example of Switchback Ramp Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative E: Lindero Dr Tunnel with Alma St Signal (Draft) PALO ALTO Top of Rail

LINDERO DR ERO DR
LINDE
Extend Driveway
Realign Intersection 10'| 12'
New Traffic Signal -
New Sidewalk New Sidewalk

ALMA ST
New Bulb-out Curb Section Through Tunnel Example 20' Wide and 10' High Tunnel San Antonio Caltrain Station in Mountain View)
New High Visibility
Pedestrian Crossings Example 12' Wide Ramp at 7% Grade
Paralle to Caltrain Tracks
LEGEND

CALTRAIN RIGHT OF WAY

KAMP AND/OK STAIK STRUCTURE
TUNNEL - 100 FT

AT GRADE PATH

PARCEL IMPACTS

POTENTIAL PARCEL IMPACTS

BOLLARD

PARK BLVD
STAIRS
New High Visibility
Pedestrian Crossing TRAFFIC SIGNAL
* ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

ROBLES PARK Example of Switchback Ramp
Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative F: Ely Pl Tunnel (Draft) PALO ALTO
Install Pedestrian Hybrid Beacon
New High Visibility
Pedestrian Crossing
ALMA ST Potential Caltrain
Right-of-way Impact
12' WIDE RAMP
(15.5' WIDE STRUCTURE)
12) WIDE RAMP
(15.5' WDE Pedestrian Hybrid Beacon Example 12' Wide Ramp at 7% Grade Parallel STRUCTURE) to Caltrain Tracks
LEGEND Top of Rail

CALTRAIN RIGHT OF WAY

RAMP AND/OR STAIR STRUCTURE
TUNNEL = 85 FT

AT GRADE PATH

PARCEL IMPACTS

PARK BLVD

POTENTIAL PARCEL IMPACTS

BOLLARD
STAIRS
• ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

Section Through Tunnel Example 20' Wide and 10' High Tunnel 'San Antonio Caltrain Station in Mountain View)
13000
Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative G: Ferne Ave Tunnel (Draft)

PALO ALTO
BRIARWOOD WAY Top of Rail

FERNE CT
Example Section Through Tunnel Example 20' Wide and 10' High Tunnel HEMLOCK C San Antonio Caltrain Station in Mountain View) Example 12' Wide Ramp at 7% Grade
Parallel to Caltrain Tracks
LEGEND

CALTRAIN RIGHT OF WAV

CITY LIMITS
"CHINC AVC AT GRADE PATH
New High Visibility TRAFFIC SIGNAL
New Traffic Signal Pedestrian Crossings

ALMA ST

CHEY OF PALO ALTO-
• ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

Coordination with Example Pathway Through a Parking Lot (Caltrain Bike Path in Palo Alto) Mountain View Needed
Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

CITY OF
Alternative H: San Antonio Bridge Enhancements (Draft) PALO ALTO

NITA AVE

MACKAY DR
Enhance Bike/Ped
Crossings at Nita Ave
Parking
Removal
Upgrade Overhead
Lighting
BRIARWOOD WAY Example of Intersection that Transitions from Example of Two-Way Cycle Track at the Median Side-Running to Center-Running Bike Lanes (Monterey, CA) (N. Fremont St in Monterey, CA) | LEGEND

CALTRAIN RIGHT OF WAY

CITY LIMITS

TWO-WAY SEPARATED CYCLE TRACK

PARCEL IMPACTS SAN AT TOOLO RO SAN ANTOOUD RO
New Bike Ramp SAN ANTONIO AVE BOLLARD
Existing Path to Caltrain Station SAN ANTONIO RD PARKING REMOVAL, APPROX. 10 SPACES • ALL DIMENSIONS AND DISTANCES ARE APPROXIMATE.

New High Visibility Coordination with
Pedestrian and Bike Crossing
Extend and Connect Bikel
Path to Existing Path to
Caltrain Station ALMA ST
Section through San Antonio Rd
Draft design concepts shown are preliminary and intended for discussion purposes only. All concepts are flexible and subject to refinement. Additional community engagement and technical design work will be needed once locations and basic design concepts have been decided

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