Method and apparatus for displaying a representation of a traffic intersection

41 Pages·2014·3.23 MB·English

US008650004B2
(12) United States Patent (10) Patent N0.: US 8,650,004 B2
Carrasco et al. (45) Date of Patent: Feb. 11, 2014
(54) METHOD AND APPARATUS FOR (56) References Cited
DISPLAYING A REPRESENTATION OF A
TRAFFIC INTERSECTION U.S. PATENT DOCUMENTS
6,760,693 B1* 7/2004 Desai et al. ..................... .. 703/8
(75) Inventors: Milton Santano Elias Carrasco, 6,996,507 B1* 2/2006 Myr ................................ .. 703/2
Richmond (CA); Darren Earl Brown, 7,197,181 B1 3/2007 Coté
Burnaby (CA); Guanggui Pei, New (Continued)
Westminster (CA); Steven Chi Kit
Chan, Richmond (CA); Daniel AkWera FOREIGN PATENT DOCUMENTS
Shihundu, Richmond (CA)
CA 2271204 A1 6/1998
CA 2588576 A1 5/1999
(73) Assignee: Transoft Solutions, Inc., Richmond,
(Continued)
British Columbia (CA)
OTHER PUBLICATIONS
(*) Notice: Subject to any disclaimer, the term of this
State of Maryland Department of Transportation, Roundabout
patent is extended or adjusted under 35
Design Guidleines, Oct. 1999, State of Maryland Department of
U.S.C. 154(b) by 596 days.
Transportation, pp. 1-70.*
(Continued)
(21) Appl. N0.: 12/664,049
Primary Examiner * Omar Fernandez Rivas
(22) PCT Filed: Nov. 26, 2008
Assistant Examiner * Bernard E Cothran
(74) Attorney, Agent, or Firm * Knobbe Martens Olson &
(86) PCT No.: PCT/CA2008/002098 Bear LLP
§ 371 (0X1)’
(57) ABSTRACT
(2), (4) Date: Dec. 10, 2009
A method and apparatus for displaying a representation of a
traf?c roundabout having a central island surrounded by a
(87) PCT Pub. No.: WO2010/060180
circulatory lane is disclosed. The method involves receiving
PCT Pub. Date: Jun. 3, 2010 an operator selection of a design vehicle that is expected to
use the roundabout, and receiving operator input of a design
dimension for the roundabout, the design dimension de?ning
(65) Prior Publication Data
a siZe of one of the central island and an outer perimeter of the
US 2011/0071801A1 Mar. 24, 2011 circulatory lane. The method also involves generating a cir
culatory path of the design vehicle traveling Within the design
dimension along the circulatory lane, and generating vehicle
(51) Int. Cl.
extent locations associated With passage of the design vehicle
G06F 17/50 (2006.01)
along the circulatory path. The method also involves using the
(52) US. Cl.
vehicle extent locations to compute a circulatory lane Width,
USPC ............................................................ .. 703/1 and generating display signals for causing the display to
(58) Field of Classi?cation Search display an image representing the roundabout.
USPC ............................ .. 703/1; 404/1; 472/2, 19, 3
See application ?le for complete search history. 62 Claims, 22 Drawing Sheets
CAD System
lnlerlace Functions
US 8,650,004 B2
Page 2
(56) References Cited Highways. www.Highways -Mag.Co.Ul<. pp. 40-44. Jun. 2009. Traf
?c Calming. Magic Roundabouts. (available at http://c484350.r50.
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7,336,851 B1 2/2008 Cote Engineers Spinning Their Wheels. Dynamic software delivers solu
7,447,616 B2 * 11/2008 Wang et al. ..................... .. 703/8 tions for BETA Group” Case Study. Torus Roundabouts. Feb. 13,
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WO 2010/060180 A1 6/2010
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dated Oct. 2,2013.
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Nice, “Bentley Rail Track Update,” Bentley Systems UK, downloaded
Road%20planning%20and%20design%20 manual/
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“Roundabouts.” Jun. 1, 2007, XP055080241, Retrieved from the
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000336, 12 pages, mailed Jul. 17, 2012. * cited by examiner
US. Patent Feb. 11,2014 Sheet 1 0f 22 US 8,650,004 B2
1 00
Traffic
intersection
functions
m
A
108
v
110
Operator CAD system
input 104/ 1_02_
FIG. 1
US. Patent Feb. 11,2014 Sheet 2 0f 22 US 8,650,004 B2
150
\ 180
r—j%
182 184
156 Q /
200 /\ Design Vehicle Media
Database Reader
Reference line @
202 m coordinates
210/» R0, v, f, e, D0
A“ Rmim Rn
214 m Ad), AD I 154
N Turning path, UP
216 Vehicle extents _1_5_g _ O/S “164
Design vehicle CAD System $166
218 f» -
selection . . .
Traffic intersectlon W168
220 I» 81 - 89 functions
222 m D0,,’ Dcb RA interface Functions $170
Pointing Device
190 194
HO
E
\ 196 > ‘t F‘ \
198
FIG. 2
US. Patent Feb. 11,2014 Sheet 3 0f 22 US 8,650,004 B2
5 , t‘ ......... _ g _ _ I _
l 278
252 FIG. 3
300
Receive operator input of first and second
roadway orientations
302
l
Receive operator selection of design vehicle
E
V
Generate turning path of the design vehicle
306
V
Generate vehicle extent locations
308
l
Generate outer edge of intersection area
310
l
Generate display signals
312
FIG. 4
US. Patent
Feb. 11, 2014 Sheet 4 0f 22 US 8,650,004 B2
Bus 40 Sta ndard Bus
,,,,,,, WWElSUSerM-T ......................... H
326 me
340‘
Vehicte Name
Bus 40 WB~50 P Units
Standard Bus Semi-Trailer Pasenger Car
342 Steering lock angle 39.3 17.7 31.6 degrees
344 Length 40 55 19 ft
346 Front overhang 6 3 3 ‘ft
348 Width 8.5 8 7 it
850 Wheelbase 25.85 12.5 (tractor only) 11 it
352 Front axle group track 85 8 (tractor oniy) 6 ft
354 Front axle group wheeis 2 2 (tractor oniy) 2 each
356 Rear axle group track 8.5 8 (tractor oniy) 6 ft
2 axles. 4 wheels 2 axles, 4 wheels on
358 Rear axle group wheels on each each (tractor Univ) 2 each
860 No of parts 1 2 1 each
362 Pivot location NA 3 NA ft
364 T rat' 1 er t en g t h NA 42 __5 NA 1 t
366 Ar t't cu | at' mg ang I e NA 70 NA d egress
FIG. 6
US. Patent Feb. 11,2014 Sheet 5 0f 22 US 8,650,004 B2
380
FIG
. 7
FIG. 8
US. Patent Feb. 11,2014 Sheet 6 0f 22 US 8,650,004 B2
450
Receive operator input of:
Turning radius (R0) l
speed (v) Turn front wheel by MD 4
side friction factor (f) g ‘
superelevation (e);
clearance offset (DO).
Compute Rn
V
Compute minimum
turn radius Rmin v
@ Move bicycle model forward
about Rn by distance AD
£L§§
V
Use rear and front wheel
locations to compute design
vehicle extent locations
@
Locate bicycle model on
approach path and move to
start of turn while generating
vheicle extent locations
@
V
Compute steering increment AG)
Q
l—
FIG. 9A
US. Patent
Feb. 11, 2014 Sheet 7 0f 22 US 8,650,004 B2
450
Move bicycle model forward
about R0 by distance AD 4
m
V
Use rear and front wheel
locations to compute design
vehicle extent locations
&
V
Generate shape of second
transition portion and locate
the shape tangent to the front
wheel direction.
gag
End
ofsecond
transition portion parallel to
exit reference line?
5%
Y
i
Move bicycle model along the
departure portion of turning
path while generating vehicle
extent locations
@
i
Y 2488
End
FIG. 9B
US. Patent Feb. 11,2014 Sheet 8 0f 22 US 8,650,004 B2
524
514
’ '\
. ' '\
— .\
8 522 505 521 525%?
278
FIG. 10