Manara-CS090616 (4)(12/23/2009) Ken Griffin - RE: Standard Bus Design Vehicles Page 1
From: <scot.johnson @kimley - horn.com>
To: <kgriffin @ci.coppell.tx.us>
CC: <MDIAMOND @ci.coppell.tx.us >, <sadak.shaik @g mail. com>
Date: 6/16/2009 12:03 PM
Subject: RE: Standard Bus Design Vehicles
Attachments: AASHTO 2004 Standard Buses. pdf
Sorry, here it is.
Scot A. Johnson, P.E., PTOE
Kimley -Horn & Associates, Inc.
12700 Park Central Dr., Suite 1800
Dallas, Texas 75251
Ph 972- 776 -1735 Fax - 972- 239 -3820
scot.johnson@kimley-horn.com
- - - -- Original Message---- -
From: Ken Griffin [mailto :kgriffin @ci.coppell.tx.us]
Sent: Tuesday, June 16, 2009 11:57 AM
To: Johnson, Scot
Cc: Marcie Diamond; sadak.shaik @gmail.com
Subject: Re: Standard Bus Design Vehicles
Scot
There are no attachments.
Ken Griffin
>>> <scot.johnson @kimley - horn.com> 6/16/2009 11:45 AM >>>
Ken,
Attached are sheets from the 2004 Green Book as we discussed. As you can see the large school bus
(S- BUS -40) has the 20' wheelbase, but its steering angle is much less than the 40' transit bus
(CITY -BUS), so their turning radii are more similar than the difference in wheelbase might indicate.
Let me know if you need anything else.
Scot
Scot A. Johnson, P.E., PTOE
Kimley -Horn & Associates, Inc.
12700 Park Central Dr., Suite 1800
Dallas, Texas 75251
Ph 972- 776 -1735 Fax - 972- 239 -3820
scot.johnson@kimley-horn.com
N
0 CV)
CO (A 4�6
0
0
0
N
v
p�
tk
�7
40' Bus Turnin g Exhibit
KHA June 15, 2009 Scale: 1" = 30' on 8.5x11" Plot
rn
x
a�
0
A Policy on
Geometric D'esign of
H ighways and Streets
° Copyright 2004, by the American Association of State Highway and
g Y
Transportation Officials. All .R.ights Reserved. This book, or parts thereof, may
not be reproduced in any form without written permission of the publisher.
Printed in the United States of America.
. ISBN: 1-56051-263-6
. ... .... .. .
AASHTO-Geometric Desi of Hi and Streets
e,
US Customar
17
•.]'• Z,
2
v n
A
w,
ME
A ..Ki" - j. `s''•' Z.. tii.:"; �,!�.
t M R.
R Y. ... <yr W
i th tu4n ,�i�a. }�. r
yr R .�:•.� .{�a... :'i a. +.;� ti.•, -�?•• �t -:•c.. �'(r•, Ewa
`�Sa''1.,, .w .� • .�$'r•' etc' �� "'N2,12R� • ••. r:�r „ -, :is =e4 F� • � �•� H...,•` ,�,r - ��� 'Yhr+ut:
44
S P SU BUS-40 BUS-45 CITY-BUS:, S-BU S36 S-BUS40 A-BUS WB-40 WB-50
Minimum
Desi
Turnin 24 42 45 45 42.0 38.9 39.4 39.8 40 45
Radius
ft)
Center-
line'
Turnin 21 38 40.8 40.8 37.8 34.9 35.4 35.5 36 41
Radius
(CTR) (ft)
Minimum
Inside
14.4 28.3 27.6 25.5 24.5 23.8 25.4 21.3 19-3 17.0
Radius
11; 711�
3M
M ,
c 'a '
_Nt • 1 04 D V
_
1 .0 1 �
0907"u� , _ rk� - , _?�� 'i' - I -
We _
Desi vehicle with 48-ft trailer as adopted in 1982 Surface Transportation Assistance Act (STAA).
Desi vehicle with 53-ft trailer as g randfathered in with 1982 Surface Transportation Assistance. Act (STAR).
The turning - radius assum b - adesi when -i nvesti n - possible tu mi n paths and is set at th centerline of
-tumin front axle of a -vehicle.. If the minimum . is assumed, the CTR . approximatel eq u a ls .the minimum
design turning radius W-the
minus one front idtftofthea vehic le.
w
2
- ;�passen passen sizes. This corresponds to wheelbase .
School buses, are manufa�dtured from.
-'..s -desi
-14,01 tol 20 .&A,-:.-�! q IV61. -fprAhese..: differ, izes,4,..the minimum
t different-:sizes, turnin radii var from
.1en, gthp,pf I i is t o,,, r ad, j i • V. -a" M
W-
254A.
t
-4-' arid; .. ... ..
28:8 ,ft. o. 39�, 'minimum
T
g on a drive is
0 g h. point. Front wheel dri
t e� 0
rhin rad u js�Jor. 450-2 0:- r"With.-bri" 18,-51--1 h ached to hitch
and, without,brakesbein a -,,.
: applied::
Exhibit 2-2. Minim'um Turnin Radn"O.Desi Vehicles ( Continued)
20
■ r
a
2Z
5�gpoa gY
N •G' --.•i:
1'�, W.40"
102
10, 0'1�1 17F
@
RSUB" .
='w
S
y m b
WB-62*
WB-65.
WB-67D
W13 -1 66T
TVB-10913.
MH
PIT
P/B
MH/B
TRAM
or WB-67
u m
Min
nim
FDesi
D esi g n
Turnin
T i
45
45
45
45
60
40
33
24
50
18
Radius
ft
Center-
line'
Turnin
41
41.
41
41
56
36
30
21
46
14
Radius
( CTR ) ft
Minimumt
Inside
7.9
4.4
19.3
9.9
14.9
25.9
17.4
8.0
35.1
10.5
Radius
ft
Desi vehicle with 48-ft trailer as adopted in 1982 Surface Transportation Assistance Act (STAA).
Desi vehicle with 53-ft trailer as g randfathered in with 1982 Surface Transportation Assistance. Act (STAR).
The turning - radius assum b - adesi when -i nvesti n - possible tu mi n paths and is set at th centerline of
-tumin front axle of a -vehicle.. If the minimum . is assumed, the CTR . approximatel eq u a ls .the minimum
design turning radius W-the
minus one front idtftofthea vehic le.
w
2
- ;�passen passen sizes. This corresponds to wheelbase .
School buses, are manufa�dtured from.
-'..s -desi
-14,01 tol 20 .&A,-:.-�! q IV61. -fprAhese..: differ, izes,4,..the minimum
t different-:sizes, turnin radii var from
.1en, gthp,pf I i is t o,,, r ad, j i • V. -a" M
W-
254A.
t
-4-' arid; .. ... ..
28:8 ,ft. o. 39�, 'minimum
T
g on a drive is
0 g h. point. Front wheel dri
t e� 0
rhin rad u js�Jor. 450-2 0:- r"With.-bri" 18,-51--1 h ached to hitch
and, without,brakesbein a -,,.
: applied::
Exhibit 2-2. Minim'um Turnin Radn"O.Desi Vehicles ( Continued)
20
Design Controls and Criteria
/!r
# :< < '
y 1
N,
Oe
3, Aver
Y `..
All
•: >•• 4 ^
,��r.
• ,
N%.
t`
' •fir'; •�.
� _
tot
..
0.
..:
t .
;
✓'" o • .
`:W lit ax
Exhibit 2 - Minimum Turning Path for City Transit Bus (CITY- BUS) Resign Vehicle
25
� j
Exhibit 2 -8. Minimum Turning Path for Conventional School Bus (S- BUS -11 IS-BUS-361)
_ Design Vehicle
26
AAS`HTO—Geometrie Design of Highways and Streets
:!7
Taft
F35. A
Eli
is
�,f!Ilir'
s:
��• �� �I
�.Y•
IRV
rig
we
i :.�� it s
� . ' Y� •
r
� j
Exhibit 2 -8. Minimum Turning Path for Conventional School Bus (S- BUS -11 IS-BUS-361)
_ Design Vehicle
26
{Tratt�it'stylo}
k
-00
Alp ti
of
felt
P:wh' 6(ftot.
N
I.F
A
if
'A
0 A
-L
path -of A'
A
AMU
0 THL! p,
Exhibit 2-9. Minimum Turnin Path for Lar School Bus ( S-BUS-12 I S-BUS-401)
Desi Vehicle
27