Table Of ContentResearch Report
KTC-11-19/SPR415-11-1F
KENTUCKY TRANSPORTATION CENTER
GUIDELINES FOR ROAD DIET CONVERSIONS
OUR MISSION
We provide services to the transportation community
through research, technology transfer and education.
We create and participate in partnerships
to promote safe and effective
transportation systems.
OUR VALUES
Teamwork
Listening and communicating along with
courtesy and respect for others.
Honesty and Ethical Behavior
Delivering the highest quality
products and services.
Continuous Improvement
In all that we do.
5HVHDUFK5HSRUW
.7&63R )
GUIDELINES FOR ROAD DIET CONVERSIONS
Draft Final Report
E\
1LNLIRURV6WDPDWLDGLV
3URIHVVRU
$GDP.LUN
5HVHDUFK(QJLQHHU
&KHQ:DQJ
*UDGXDWH5HVHDUFK$VVLVWDQW
$QGUHD&XOO
*UDGXDWH5HVHDUFK$VVLVWDQW
$QG
1LWKLQ$JDUZDO
*UDGXDWH5HVHDUFK$VVLVWDQW
'HSDUWPHQWRI&LYLO(QJLQHHULQJ
DQG
.HQWXFN\7UDQVSRUWDWLRQ&HQWHU
&ROOHJHRI(QJLQHHULQJ
8QLYHUVLW\RI.HQWXFN\
/H[LQJWRQ.HQWXFN\
7KHFRQWHQWVRIWKLVUHSRUWUHIOHFWWKHYLHZVRIWKHDXWKRUVZKRDUHUHVSRQVLEOHIRUWKHIDFWVDQG
DFFXUDF\RIWKHGDWDSUHVHQWHGKHUHLQ7KHFRQWHQWVGRQRWQHFHVVDULO\UHIOHFWWKHRIILFLDOYLHZV
RISROLFLHVRI WKH8QLYHUVLW\RI.HQWXFN\ WKH.HQWXFN\7UDQVSRUWDWLRQ&DELQHWRU WKH)HGHUDO
+LJKZD\$GPLQLVWUDWLRQ7KLVUHSRUWGRHVQRWFRQVWLWXWHDVWDQGDUGVSHFLILFDWLRQRUUHJXODWLRQ
7KHLQFOXVLRQRIPDQXIDFWXUHQDPHVDQGWUDGHQDPHVLVIRULGHQWLILFDWLRQSXUSRVHVDQGLVQRWWR
EHFRQVLGHUHGDQHQGRUVHPHQW
1RYHPEHU
1. Report Number 2. Government Accession No. 3. Recipient’s Catalog No.
KTC-11-XX / SPR-415-11-1F
4. Title and Subtitle 5. Report Date
Guidelines for Road Diet Conversions November 2011
6. Performing Organization Code
7. Author(s) 8. Performing Organization Report No.
N. Stamatiadis, A. Kirk, C. Wang, and A. Cull
KTC-11-XX / SPR-415-11-1F
9. Performing Organization Name and Address 10. Work Unit No.
Kentucky Transportation Center
College of Engineering
University of Kentucky 11. Contract or Grant No.
Lexington, Kentucky 40506-0281 SPR316
12. Sponsoring Agency Name and Address 13. Type of Report and Period Covered:
Final Report; 07/10 – 12/11
Kentucky Transportation Cabinet
Fi l
200 Mero Street
14. Sponsoring Agency Code
Frankfort, KY
15. Supplementary Notes
16. Abstract
7KH SXUSRVH RI WKLV UHSRUW LV WR GRFXPHQW WKH GHYHORSPHQW RI WKH JXLGHOLQHV IRU WKH URDG GLHW
FRQYHUVLRQVSUHSDUHGIRU WKH.HQWXFN\7UDQVSRUWDWLRQ&DELQHW7KHJXLGHOLQHVFRQVLGHURSHUDWLRQDO
DQGVDIHW\DVSHFWVRIWKHFRQYHUVLRQVWRDVVLVWLQWKHSUHOLPLQDU\GHWHUPLQDWLRQRIZKHWKHUDURDGGLHW
FRQYHUVLRQ LV DSSURSULDWH IRU D JLYHQ URDGZD\ VHJPHQW 7KH JXLGHOLQHV SURYLGH VXJJHVWHG FURVV
VHFWLRQ GHVLJQV WUDQVLWLRQ WR DQG IURP WKH URDG GLHW VHFWLRQ DQG D IORZ FKDUW IRU GHWHUPLQLQJ WKH
DSSURSULDWHDFWLRQV
17. Key Words 18. Distribution Statement
Intersection Design, Roundabout, Inside left-turn, median Unlimited
u-turn, superstreet, continuous flow, jughandle, bowtie,
intersection evaluation
L
19. Security Classification (report) Security Classification (this 21. No. of Pg: 94 22. Price $0
8QFODVVLILHG page) 8QFODVVLILHG
TABLE OF CONTENTS
(;(&87,9(6800$5<LY
,1752'8&7,21
/,7(5$785(5(9,(:
0(7+2'2/2*<
5(68/76
6LJQDOL]HG,QWHUVHFWLRQV
8QVLJQDOL]HG,QWHUVHFWLRQV
2SHUDWLRQV0RGHOV
6LJQDOL]HG,QWHUVHFWLRQ6DIHW\
8QVLJQDOL]HG,QWHUVHFWLRQ6DIHW\
6DIHW\0RGHOV
6XPPDU\
&$6(678',(6
86&DPSEHOO&RXQW\
(XFOLG$YH)D\HWWH&RXQW\
.<)OR\G&RXQW\
860HUFHU&RXQW\
86:RRGIRUG&RXQW\
6XPPDU\
*8,'(/,1(6
5RDG'LHW&RQYHUVLRQV
&21&/86,216$1'6800$5<
5()(5(1&(6
$33(1',;$
$33(1',;%
LIST OF FIGURES
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH 8QVLJQDOL]HG LQWHUVHFWLRQ VLGH VWUHHW GHOD\ GLIIHUHQFHV YSK VLGH VWUHHW
YROXPH
)LJXUH 8QVLJQDOL]HG LQWHUVHFWLRQ VLGHVWUHHW GHOD\ GLIIHUHQFHV YSK VLGH VWUHHW
YROXPH
)LJXUH*XLGHOLQHIRURSHUDWLRQDOSHUIRUPDQFHDWVLJQDOL]HGLQWHUVHFWLRQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH 'LIIHUHQFH LQ PDLQ VWUHHW ODQH FKDQJH FRQIOLFWV EHWZHHQ IRXU DQG WKUHHODQH
VLJQDOL]HGLQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
LL
)LJXUH'LIIHUHQFHLQPDLQVWUHHWUHDUHQGFRQIOLFWVEHWZHHQIRXUDQGWKUHHODQHXQVLJQDOL]HG
LQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH 'LIIHUHQFH LQ PDLQ VWUHHW ODQH FKDQJH FRQIOLFWV EHWZHHQ IRXU DQG WKUHHODQH
VLJQDOL]HGLQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH*XLGHOLQHVIRUUHDUHQGFRQIOLFWVE\PDLQDQGVLGHVWUHHWYROXPHDQGSHUFHQWOHIWWXUQV
)LJXUH*XLGHOLQHVIRUODQHFKDQJHFRQIOLFWVE\PDMRUPLQRUVWUHHWYROXPHVDQGSHUFHQW OHIW
WXUQV
)LJXUH:HVWHUQWHUPLQXVRI86URDGGLHW
)LJXUH'HFLVLRQDFWLRQIORZFKDUWIRUURDGGLHWHYDOXDWLRQV
LIST OF TABLES
7DEOH/HYHORIVHUYLFHDQGPD[LPXPVXPRIFULWLFDOODQHYROXPHVDWVLJQDOL]HGLQWHUVHFWLRQV
7DEOH5DQJHRIGHOD\GLIIHUHQFHVE\VLGHVWUHHWYROXPH«««««««««««««««
7DEOH5DQJHRIDYHUDJHTXHXHGLIIHUHQFHVE\VLGHVWUHHWYROXPH«««««««««««
7DEOH&RHIILFLHQWVIRUSUHGLFWLYHPRGHOV««««««««««««««««««««««
7DEOH&RHIILFLHQWVIRUSUHGLFWLYHPRGHOV««««««««««««««««««««««
LLL
TABLE OF CONTENTS
)LQDOL
(;(&87,9(6800$5<LY
,1752'8&7,21
/,7(5$785(5(9,(:
0(7+2'2/2*<
5(68/76
6LJQDOL]HG,QWHUVHFWLRQV
8QVLJQDOL]HG,QWHUVHFWLRQV
2SHUDWLRQV0RGHOV
6LJQDOL]HG,QWHUVHFWLRQ6DIHW\
8QVLJQDOL]HG,QWHUVHFWLRQ6DIHW\
6DIHW\0RGHOV
6XPPDU\
&$6(678',(6
86&DPSEHOO&RXQW\
(XFOLG$YH)D\HWWH&RXQW\
.<)OR\G&RXQW\
860HUFHU&RXQW\
86:RRGIRUG&RXQW\
6XPPDU\
*8,'(/,1(6
5RDG'LHW&RQYHUVLRQV
&21&/86,216$1'6800$5<
5()(5(1&(6
$33(1',;$
$33(1',;%
,1752'8&7,21
52$'',(7&219(56,216
3URFHVV
2SHUDWLRQDO3HUIRUPDQFH
6DIHW\3HUIRUPDQFH
2WKHU&RQVLGHUDWLRQV
'HVLJQ&RQVLGHUDWLRQV
7UDQVLWLRQ
&URVV6HFWLRQ
$FFHVV'HQVLW\
3HUIRUPDQFH(YDOXDWLRQ
:KHQ1RWWR&RQYHUW
$QDO\VLV&KHFNOLVW
5()(51&(6
LIST OF FIGURES
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
LL
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH 8QVLJQDOL]HG LQWHUVHFWLRQ VLGH VWUHHW GHOD\ GLIIHUHQFHV YSK VLGH VWUHHW
YROXPH
)LJXUH 8QVLJQDOL]HG LQWHUVHFWLRQ VLGHVWUHHW GHOD\ GLIIHUHQFHV YSK VLGH VWUHHW
YROXPH
)LJXUH*XLGHOLQHIRURSHUDWLRQDOSHUIRUPDQFHDWVLJQDOL]HGLQWHUVHFWLRQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH 'LIIHUHQFH LQ PDLQ VWUHHW ODQH FKDQJH FRQIOLFWV EHWZHHQ IRXU DQG WKUHHODQH
VLJQDOL]HGLQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH'LIIHUHQFHLQPDLQVWUHHWUHDUHQGFRQIOLFWVEHWZHHQIRXUDQGWKUHHODQHXQVLJQDOL]HG
LQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH 'LIIHUHQFH LQ PDLQ VWUHHW ODQH FKDQJH FRQIOLFWV EHWZHHQ IRXU DQG WKUHHODQH
VLJQDOL]HGLQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH*XLGHOLQHVIRUUHDUHQGFRQIOLFWVE\PDLQDQGVLGHVWUHHWYROXPHDQGSHUFHQWOHIWWXUQV
)LJXUH*XLGHOLQHVIRUODQHFKDQJHFRQIOLFWVE\PDMRUPLQRUVWUHHWYROXPHVDQGSHUFHQW OHIW
WXUQV
)LJXUH:HVWHUQWHUPLQXVRI86URDGGLHW
)LJXUH'HFLVLRQDFWLRQIORZFKDUWIRUURDGGLHWHYDOXDWLRQV
LIST OF TABLES
7DEOH/HYHORIVHUYLFHDQGPD[LPXPVXPRIFULWLFDOODQHYROXPHVDWVLJQDOL]HGLQWHUVHFWLRQV
7DEOH5DQJHRIGHOD\GLIIHUHQFHVE\VLGHVWUHHWYROXPH«««««««««««««««
7DEOH5DQJHRIDYHUDJHTXHXHGLIIHUHQFHVE\VLGHVWUHHWYROXPH«««««««««««
7DEOH&RHIILFLHQWVIRUSUHGLFWLYHPRGHOV««««««««««««««««««««««
7DEOH&RHIILFLHQWVIRUSUHGLFWLYHPRGHOV««««««««««««««««««««««
LLL
TABLE OF CONTENTS
(;(&87,9(6800$5<LY
,1752'8&7,21
/,7(5$785(5(9,(:
0(7+2'2/2*<
5(68/76
6LJQDOL]HG,QWHUVHFWLRQV
8QVLJQDOL]HG,QWHUVHFWLRQV
2SHUDWLRQV0RGHOV
6LJQDOL]HG,QWHUVHFWLRQ6DIHW\
8QVLJQDOL]HG,QWHUVHFWLRQ6DIHW\
6DIHW\0RGHOV
6XPPDU\
&$6(678',(6
86&DPSEHOO&RXQW\
(XFOLG$YH)D\HWWH&RXQW\
.<)OR\G&RXQW\
860HUFHU&RXQW\
86:RRGIRUG&RXQW\
6XPPDU\
*8,'(/,1(6
5RDG'LHW&RQYHUVLRQV
5RDG'LHW&RQVLGHUDWLRQVError! Bookmark not defined.
'HVLJQ&RQVLGHUDWLRQVError! Bookmark not defined.
5RDG'LHW1RW5HFRPPHQGHGError! Bookmark not defined.
&21&/86,216$1'6800$5<
5()(5(1&(6
$33(1',;$
$33(1',;%
LIST OF FIGURES
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQGHOD\GLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH6LJQDOL]HGLQWHUVHFWLRQDYHUDJHTXHXHGLIIHUHQFHVYSKVLGHVWUHHWYROXPH
)LJXUH 8QVLJQDOL]HG LQWHUVHFWLRQ VLGH VWUHHW GHOD\ GLIIHUHQFHV YSK VLGH VWUHHW
YROXPH
)LJXUH 8QVLJQDOL]HG LQWHUVHFWLRQ VLGHVWUHHW GHOD\ GLIIHUHQFHV YSK VLGH VWUHHW
YROXPH
)LJXUH*XLGHOLQHIRURSHUDWLRQDOSHUIRUPDQFHDWVLJQDOL]HGLQWHUVHFWLRQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
LL
)LJXUH'LIIHUHQFH LQPDLQVWUHHW UHDUHQGFRQIOLFWVEHWZHHQIRXUDQG WKUHHODQHVLJQDOL]HG
LQWHUVHFWLRQVE\VLGHVWUHHWYROXPHSHUFHQWOHIWWXUQV
)LJXUH 'LIIHUHQFH LQ PDLQ VWUHHW ODQH FKDQJH FRQIOLFWV EHWZHHQ IRXU DQG WKUHHODQH
VLJQDOL]HGLQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH'LIIHUHQFHLQPDLQVWUHHWUHDUHQGFRQIOLFWVEHWZHHQIRXUDQGWKUHHODQHXQVLJQDOL]HG
LQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH 'LIIHUHQFH LQ PDLQ VWUHHW ODQH FKDQJH FRQIOLFWV EHWZHHQ IRXU DQG WKUHHODQH
VLJQDOL]HGLQWHUVHFWLRQVYSKVLGHVWUHHWYROXPH
)LJXUH*XLGHOLQHVIRUUHDUHQGFRQIOLFWVE\PDLQDQGVLGHVWUHHWYROXPHDQGSHUFHQWOHIWWXUQV
)LJXUH*XLGHOLQHVIRUODQHFKDQJHFRQIOLFWVE\PDMRUPLQRUVWUHHWYROXPHVDQGSHUFHQWOHIW
WXUQV
)LJXUH:HVWHUQWHUPLQXVRI86URDGGLHW
)LJXUH'HFLVLRQDFWLRQIORZFKDUWIRUURDGGLHWHYDOXDWLRQV
LIST OF TABLES
7DEOH/HYHORIVHUYLFHDQGPD[LPXPVXPRIFULWLFDOODQHYROXPHVDWVLJQDOL]HGLQWHUVHFWLRQV
7DEOH5DQJHRIGHOD\GLIIHUHQFHVE\VLGHVWUHHWYROXPH«««««««««««««««
7DEOH5DQJHRIDYHUDJHTXHXHGLIIHUHQFHVE\VLGHVWUHHWYROXPH«««««««««««
7DEOH&RHIILFLHQWVIRUSUHGLFWLYHPRGHOV««««««««««««««««««««««
7DEOH&RHIILFLHQWVIRUSUHGLFWLYHPRGHOV««««««««««««««««««««««
LLL
