Howard Street F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t S e c o n d S tr e e t S h a w A ll e y Minna Street Natoma Street Platforms: 280m 300m 300m 270m 270m Min R: 180m Platform R: 500m Tehama Street 200m min radius 5 platforms Lengths 270m - 300m (875' - 975')
(Sixth platform road would collide with new CNet building)
Shorter platforms between larger approach curves F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t S e c o n d S tr e e t S h a w A ll e y Minna Street Natoma Street Howard Street Platforms: 290m 320m 320m 340m 340m 330m Min R: 180m Platform R: 500m 180m min radius 6 platforms Lengths 300m - 340m (975' - 1100')
Minimum design radius
180m(590', 9.7°) vs 200m(655', 8.7°)
Bigger is always better, of course.
Extemely constrained site, getting more constrained every month. Unpalatable tradeoffs are a given.
Tradeoffs: radius versus platform length, radius versus platform count, radius versus easements/takings.
UIC recommendation and UIC High Speed requirement is miniumum 180m Used by DB (ICE), RFF (TGV), etc.
To ignore this (eg design around current US commuter equipment or one particular existing
high speed train) would be very unwise: dangers of obsolescence, unique vendor, custom designs.
PTG 200m minimum appears to be coming from CHSRA, but what justification? TGV, ICE, AGV (next generation), AVE, etc can negotiate <180m
Design speeds up to 380kmh.
Real costs (station capacity, land takes) at TTT site to requiring larger radii.
Howard Street F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t S h a w A ll e y Minna Street Natoma Street Platforms: 280m 300m 300m 270m 270m Min R: 200m Platform R: 500m Curve-o-rama 5 platforms Lengths 270m - 300m (875' - 975') Straight platforms 4 through platforms Through length 180m (600') Terminating length 230 - 250m (750' -825') Howard Street F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t S h a w A ll e y Minna Street Natoma Street Platforms: 250m 180m+60m 180m 200m 200m 230m Min R: 200m Platform R: ∞ Platform Radius P Track Radius R Platform Gap g D o o rw a y o ff s e t d B o g ie o ff s e t b
Platform curvature (none vs 500+m radius)
Zero curvature is best, of course.
Extemely constrained site, getting more constrained every month. Unpalatable tradeoffs are a given.
Tradeoffs: curved platforms versus platform length, curved platforms versus safety.
Nearly all rail operators in the world serve stations
with curved platforms, particularly at constrained urban stations.
Platform gap (ADA, etc) is manageable.
Typical suburban bilevel
R 600m, b 9.5m, d 6m, gap = 3.0cm = 1.2 inch
TGV
R 600m, b 10m, d 8m, gap = 5.3cm = 2.1 inch
Cars with doors at extremities are problematic...
Crew sighting along train length is addressed by platform-mounted or in-cab CCTV. Standard equipment on many new suburban trains.
Paths and Throats
Restrictions and limits at TTT (both geometrical and operational) are likely to be the system-wide constraints for both all Caltrain corridor and all regional and long distance (including HSR) service. Maximal effort should be expended to "do no harm" and not to preclude future operations.
Insufficient provision for station approach special work can cause permanent capacity limits.
Ideally a pair of simultaneous departures and arrivals should be possible from any two station platforms.
Even if traffic levels will not justify complex special work in the medium future, attempt to allow future reconfiguration through careful planning of excavation, column placement, etc.
Insufficient provision for long trains can cause permanent passenger capacity limits as line capacity saturates.
All successful High Speed services operate double-length (2 x 200m = 2x 650' = 1300') trains. ICE, TGV, Shinkansen.
TTT site can't accomodate 400m, but can come very close (370m in oblique orientation.) etc
Overlapping station dwells of sequential trains increases line capacity.
Train may proceed into station before previous train has cleared its platform Train waiting to depart
Overlapping station dwells of sequential trains increases line capacity.
Train held awaiting previous train departure Train waiting to depart
Anticipating future (long term!) new transbay connection to relieve at-capacity BART Transbay/San Francisco "M Line", TTT must be allow at least four platform roads poised for extension through to the East Bay.
Insufficient provision for future through-running roads can cause permanent transbay capacity problems. (Compare 2-road BART headways with 4-road Key System at TTT.)
Mission Bay Station
Alternatives in DEIR/DEIS completely inadequate
Multi-track, multi-platform station required?
Scheduling bottleneck from Bayshore to TTT. Limits express/local headways to > 10 minutes. Lengthy dwells for event (baseball) service? (Not if base service frequency is adequate!)
Diesel power terminus
Surface open-air level for terminating trains? $$$ Massive ventilation in subterranean station?
Southern end in open cut, diesels idle outside? (eg Boston South Station)
Storage yard? Leads?
Caltrans, Morrison-Knudsen, 1987
Seventh/Townsend curve must be realigned. 300m (6°) seems doable...
Catellus/C&CSF roadblocks
Berry Street (trolley buses at grade!?!!) Sixteenth Street (ditto!?!!)
Parcels zoned retail in inside of Caltrain curve adjacent to pumping station. Swap possible?
Easement under 3rd/4th/King/Townsend block will be needed. Ideally station would be at least partially under joint development on that block...
Howard Street Mission Street F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t M a in S tr e e t S e c o n d S tr e e t S h a w A ll e y Minna Street Natoma Street Platforms: 2x360m 2x370m 330m(+50m) 300m 270m 260m 240m Min R: 180m Platform R: 500m B e a le S tr e e t M a in S tr e e t ????
Obliquity
Real alternative to Second/Main loop route (Essex stub-end not a serious alternative)
Huge platform length advantages (5 x 360+m through roads possible.)
Phaseable.
Constructability questions. Mission Street utilities?
Dive under Muni MMT under Embarcadero? Station depth.
301 Mission Street (corner Beale, block 3719-1) will cost. But can be purchased/underpinned in a subsequent phase.
Perverse storage location under and aligned with TTT?
Howard Street Mission Street F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t S e c o n d S tr e e t S h a w A ll e y Minna Street Natoma Street (insert image of 301 Mission here)
Key to Property Ownership
Caltrans Vacant lot William Wilson Project Construction in Progress Developed Other Howard Street Mission Street Folsom Street Harrison Street Lansing Street Guy Place F ir s t S tr e e t F re m o n t S tr e e t B e a le S tr e e t M a in S tr e e t S p e a r S tr e e t S e c o n d S tr e e t E c k e r S tr e e t E s s e x S tr e e t Clementina Street Tehama Street Minna Street Natoma Street Market Street Bryant Street H a w th o rn e S tr e e t Stillman Street S te rl in g S tr e e t
Architectural Resource (Jan 1995)
0 10 50m 100m 200m 300m 400m 500m 600m 700m 800m 900m 0 1 0 5 0 m 1 0 0 m 2 0 0 m 3 0 0 m 4 0 0 m 5 0 0 m 6 0 0 m 7 0 0 m 0 1 0 5 0 m 1 0 0 m 2 0 0 m 3 0 0 m 4 0 0 m 5 0 0 m 6 0 0 m 7 0 0 m 0 10 50m 100m 200m 300m 400m 500m 600m 700m 800m 900m 11' 30' 20' 40' 29' 19' 14' 9' 49' 60' 71' 59' 90' 68' 50' 30' ?20? 54' 57' 9' 10' 120' 130' 100' 56' 140' 95' 105' 92' 90' 100' 125' 65' 70' 51' 28' 54' 50' 25' 27' 83' 73' 49' 33' 35' 39' 10' 10' 10' 12' 44' 14' 14' 15' 12' 30' 20' 21' 17' 35' 60' 60' 80' 117' 85' 57' 65' 75' 145' 55' 76' 60' 160' 150' 14' 9' 9' 9' 9' 21' 14' 17' 14' 12' 14' 23' 22' 21' 20' 28' 30' 17' 19' 37' 56' 48' 40'
MIssing the Point
Poor connections with other terminal transit services
Poor connections with Market Street transit services
Poor passenger circulation: all lengthwise, little lateral
Station-length rail mezzanine required. $$$ Top of Rail ~ -30 feet.
Large number of paths conflicts: inherent low throughput of stub terminals.
Future transbay throughput very poor.
Constructible? Rock line at Folsom.
Station throat and junction 80 feet down in weak rock under Fremont Street off-ramp and bus ramps.
Doesn't meet the program, can't be built, why is this on the table?
Key to Property Ownership
Caltrans
Vacant lot
William Wilson Project
Construction in Progress
Developed
Other
Howard Street
Mission Street
Folsom Street
Guy Place
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Clementina Street
Tehama Street
Minna Street
Natoma Street
Architectural Resource (Jan 1995)
0 10 50m 100m 200m 300m 400m 500m 600m 700m 800m 900m 0 10 50 m 10 0m 20 0m 30 0m 40 0m 50 0m 60 0m 70 0m
Ex
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54'
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27'
83'
49'
33'
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39' 10'
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10'
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44'
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30'
20'
21'
17'
35'
60'
60'
9'
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28'
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17'
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37'
56'
48'
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Platforms:
2x360m
2x370m
330m(+50m)
2x310m
Min R: 180m
Platform R: 500m
3736-7 3636-74 3636-75 3636-76 3636-77 3636-78A 3736-18 3736-17 3736-1? 3636-119 3736-120 3636-74 3736-67 3736-60 3736-23 3736-24 3736-25 3736-37 3736-36 3736-35 3736-27 3736-29 3736-61 3736-62 3736-64 3736-66 3736-65 3736-60 3736-97 3736-96 3736-93 3736-94 3736-98 3736-99 3736-93 3736-100 3736-92 3736-101 3736-102 3736-91 3736-89 3736-88 3736-107 3736-86 3736-85 3736-84 3736-111 3736-85 3736-83A 3736-1 3736-2 3736-4 3736-3A 3736-116 3736-110 3736-114 3736-83 3738-11 3738-12 3738-4 3739-7 3739-4 3739-8 3739-6 3739-2 3718-27 3718-26 3718-25 3718-12 3719-6 3719-8 3719-5 3719-7 3719-11 3719-9 3719-10 3719-3 3719-1 3719-17 3720-1 3720-5 3720-6 3720-7 3721-11 3721-10 3721-88 3721-35 3721-13 3721-14 3736-15 3721-16 3721-15A 3721-20 3721-31 3721-29 3721-19 3721-28 3721-21 3721-27A 3721-22 3721-23 3721-25 3721-48 3721-49 3721-47 3721-52 3721-50 3721-51 3721-53 3721-46 3721-54 3721-6 3721-45AKey to Property Ownership
Caltrans
Vacant lot
William Wilson Project
Construction in Progress
Developed
Other
Howard Street
Mission Street
Folsom Street
Harrison Street
Lansing Street
Guy Place
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Tehama Street
Minna Street
Natoma Street
Architectural Resource (Jan 1995)
0 10 50m 100m 200m 300m 400m 500m 600m 700m 800m 900m 0 1 0 5 0 m 1 0 0 m 2 0 0 m 3 0 0 m 4 0 0 m 5 0 0 m 6 0 0 m 7 0 0 m
E
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90'
90'
68'
50'
30'
?20?
100'
65'
70'
51'
28'
54'
50'
25'
27'
83'
73'
49'
33'
35'
39' 10'
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10'
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44'
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15'
30'
20'
21'
17'
35'
60'
60'
60'
9'
9'
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21'
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17'
14'
12'
14'
23'
22'
21'
20'
28'
30'
17'
19'
37'
56'
48'
40'
Platforms:
300m
320m
320m
340m
340m
330m
Min R: 180m
Platform R: 500m
3736-7 3636-74 3636-75 3636-76 3636-77 3636-78A 3736-18 3736-17 3736-1? 3636-119 3736-120 3636-74 3736-67 3736-60 3736-23 3736-24 3736-25 3736-37 3736-36 3736-35 3736-27 3736-29 3736-61 3736-62 3736-64 3736-66 3736-65 3736-60 3736-97 3736-96 3736-93 3736-94 3736-98 3736-99 3736-93 3736-100 3736-92 3736-101 3736-102 3736-91 3736-89 3736-88 3736-107 3736-86 3736-85 3736-84 3736-111 3736-85 3736-83A 3736-1 3736-2 3736-4 3736-3A 3736-116 3736-110 3736-114 3736-83 3738-11 3738-12 3738-4 3739-7 3739-4 3739-8 3739-6 3739-2 3718-27 3718-26 3718-25 3718-12 3719-6 3719-8 3719-5 3719-7 3719-11 3719-9 3719-10 3719-3 3719-1 3719-17 3720-1 3720-5 3720-6 3720-7 3721-11 3721-10 3721-88 3721-35 3721-13 3721-14 3736-15 3721-16 3721-15A 3721-20 3721-31 3721-29 3721-19 3721-28 3721-21 3721-27A 3721-22 3721-23 3721-25 3721-48 3721-49 3721-47 3721-52 3721-50 3721-51 3721-53 3721-46 3721-54 3721-6 3721-45AKey to Property Ownership
Caltrans
Vacant lot
William Wilson Project
Construction in Progress
Developed
Other
Howard Street
Mission Street
Folsom Street
Harrison Street
Lansing Street
Guy Place
F
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s
t
S
tr
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F
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Clementina Street
Tehama Street
Minna Street
Natoma Street
Architectural Resource (Jan 1995)
0 10 50m 100m 200m 300m 400m 500m 600m 700m 800m 900m 0 1 0 5 0 m 1 0 0 m 2 0 0 m 3 0 0 m 4 0 0 m 5 0 0 m 6 0 0 m 7 0 0 m
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40'
29'
19'
14'
9'
49'
60'
71'
59'
90'
90'
68'
50'
30'
?20?
100'
65'
70'
51'
28'
54'
50'
25'
27'
83'
73'
49'
33'
35'
39' 10'
10'
10'
12'
44'
14'
14'
15'
30'
20'
21'
17'
35'
60'
60'
60'
9'
9'
9'
9'
21'
14'
17'
14'
12'
14'
23'
22'
21'
20'
28'
30'
17'
19'
37'
56'
48'
40'
Platforms:
280m
300m
300m
270m
270m
Min R: 200m
Platform R: 500m
3736-7 3636-74 3636-75 3636-76 3636-77 3636-78A 3736-18 3736-17 3736-1? 3636-119 3736-120 3636-74 3736-67 3736-60 3736-23 3736-24 3736-25 3736-37 3736-36 3736-35 3736-27 3736-29 3736-61 3736-62 3736-64 3736-66 3736-65 3736-60 3736-97 3736-96 3736-93 3736-94 3736-98 3736-99 3736-93 3736-100 3736-92 3736-101 3736-102 3736-91 3736-89 3736-88 3736-107 3736-86 3736-85 3736-84 3736-111 3736-85 3736-83A 3736-1 3736-2 3736-4 3736-3A 3736-116 3736-110 3736-114 3736-83 3738-11 3738-12 3738-4 3739-7 3739-4 3739-8 3739-6 3739-2 3718-27 3718-26 3718-25 3718-12 3719-6 3719-8 3719-5 3719-7 3719-11 3719-9 3719-10 3719-3 3719-1 3719-17 3720-1 3720-5 3720-6 3720-7 3721-11 3721-10 3721-88 3721-35 3721-13 3721-14 3736-15 3721-16 3721-15A 3721-20 3721-31 3721-29 3721-19 3721-28 3721-21 3721-27A 3721-22 3721-23 3721-25 3721-48 3721-49 3721-47 3721-52 3721-50 3721-51 3721-53 3721-46 3721-54 3721-6 3721-45AKey to Property Ownership
Caltrans
Vacant lot
William Wilson Project
Construction in Progress
Developed
Other
Howard Street
Mission Street
Folsom Street
Harrison Street
Lansing Street
Guy Place
F
ir
s
t
S
tr
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F
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Clementina Street
Tehama Street
Minna Street
Natoma Street
Architectural Resource (Jan 1995)
0 10 50m 100m 200m 300m 400m 500m 600m 700m 800m 900m 0 1 0 5 0 m 1 0 0 m 2 0 0 m 3 0 0 m 4 0 0 m 5 0 0 m 6 0 0 m 7 0 0 m
