TRAFFIC IMOACT ASSESSMENT - AN OVERVIEW.pdf

TIA OVERVIEW

1. TRAFFIC IMPACT
ASSESSMENT
(TIA)
TARIKH:16 Oktober2019
TEMPAT:CREaTE, Melaka
MOHD FIKRI BIN HASSAN
BAHAGIANKEJURUTERAANTRAFIK
CAWANGANJALAN
IBUPEJABATJKRMALAYSIA

2. INTRODUCTION
TRAFFICIMPACTASSESSMENT
(TIA)
BASEDON
GUIDELINESFOR TRAFFIC IMPACTASSESSMENT
ATJ38/2018

3. HISTORY
REAM-GL10/2011GuidelinesforTraficImpactAssessment
GUIDELINESFORTRAFFICIMPACTASSESSMENT
ATJ 38/2018

4. THE IMPORTANCEOFTIA?
Whenimpactsarenotaccuratelyprojected
throughthetrafficanalysisprocess,thebest
decisionsmaynotbemade.Poordecisions
canresultintrafficcongestion,safetyissues,
or unnecessaryimprovements.

5. THEIMPORTANCEOFTIA?
DHAKA PHNOMPENH
MEXICO ?

6. WHAT IS TIA?
❑TIAisanimportanttoolusedtodeterminethetransportation
andtrafficimpactofaproposedsitedevelopmentproject
(uponfulldevelopment)onthesurroundingtrafficand
transportationsystems.
❑Itidentifiestheneedformitigationmeasuresfora
transportationsystemtoreducecongestion,aswellasto
maintainorimproveroadsafety.
❑LocalAuthoritieswilluseTIAasbasisforassessingand
apportioningadeveloper’scontributiontoroadimprovements.
❑LocalAuthoritiesalsowilluseTIAtoevaluateTraffic
ManagementPlanproposals.
❑Providesnecessarytechnicalinputtootherrelevantreports
suchasEnvironmentalImpactAssessment,SocialImpact
Assessment,DevelopmentPlan(StructureandLocalPlan),
TransportMasterPlanandtheRoadSafetyAudits.

7. WHYDOWE NEEDTIA?
1.Toobtaindegreeofcontrolataccessrequestedbythe
private/governmententities.
2.Todeterminewhattypeofaccessrequiredtobe
consideredand constructed.
3.Topredeterminefuture expansionifits required.
4.To offeralternativessolutiontotrafficimprovementas
wellas safetymeasuresfortheroad users.
NOTES:
ASPERCLAUSE2.3INATJ8/86(Pindaan2015)–ACCESS CONTROL

8. NOTE: F=FullControlofAccess
P=PartialControlofAccess
N=NoControlofAccess
NOTES:SOURCE
ATJ8/86(Pindaan2015)–Geometric Design of Roads
DesignStandard
U6 U5 U4 U3 U2 U1
RoadCategory
Expressway
Arterial
Collector
LocalStreet
F - - - - -
- P P - - -
- P P P - -
- - N N N N
DesignStandard
R6 R5 R4 R3 R2 R1
RoadCategory
Expressway
Highway
PrimaryRoad
SecondaryRoad
Road
F - - - - -
- P - - - -
- P P - - -
- - P P - -
- - - - N N
Selection of Access Control

9. All
ADT ≥ To To To
Volume
Category
PrimaryRoad R5 - - -
- - R4 R3 - -
Expressway U6 - - - -
NOTES:SOURCE
ATJ8/86(Pindaan2015)-Geometric Design of Roads
Area
Projected 3,001 1,001 151
Road
Traffic
10,001 10,000 3,000 1,000
≤150
RURAL
Expressway R6 - - - - -
Highway R5 - - - - -
- R4
Secondary
Road
MinorRoad - - - - R2 R1
URBAN
-
Arterials - U5 U4 - - -
Collector - U5 U4 U3 - -
LocalStreet - - U4 U3 U2 U1
Selection of Design Standard

10. NOTES:SOURCE
ATJ11/87(Pindaan2017)–Design Of At-Grade Intersections
Selection of Intersection Type

11. RELEVANTLAW/ REGULATION
RoadTransportAct1987Act 333 Section85(1)
Nopersonshall:-
a)constructanyaccessroad(includingpaths,drivewaysorothermeans
b)whetherpublicorprivate)tojoinanyroad:
c)constructadraintojoinadrainconstructedalongsidearoad;
d)carryoutanyworksofanydescriptionin,upon,overorunderanyroad,
Town and CountryPlanningAct1976(Act 172)
Section21A
“Sistemlaluan(lebuhraya,jalanutama)rizabnyasertaakseskeluarmasuk.Daripenemuan
analisisbahagianinidanbergantungkepadasaizpemajuan,pihakberkuasaperancang
tempatanbolehmengarahkansatulaporan‘PenilaianKesanTrafik’ disediakan, jikaperlu.”
unlessplanscontainingdetailsofthelayoutthereof(includingsuchparticularsasmay
beprescribed)havebeensubmittedtoandapprovedbytheMinisterchargedwiththe
responsibilityforworksinrelationtoaFederalroad,ortheappropriateauthorityin
relationtoaroadotherthanaFederalroad,andtheMinisterortheappropriate
authority,asthecasemaybe,mayrefusesuchapplicationorallowitonsuchconditions
asheoritmayimpose.”

12. RELEVANTLAW/ REGULATION
TownandCountry PlanningAct1976
(Act 172)Section21(1)
(Act 172)Section21(3)
planning.
(Act 172)Section21A(1)
Inadditiontothedocumentsandplansrequiredtobesubmittedundersubsection21(1)for
planningpermission,theapplicantshallsubmitaDevelopmentProposalReportwhichshall
containthefollowing:
(g)suchmattersasmaybeprescribedbythelocalplanningauthority.”
Wherethedevelopmentinvolvestheerectionofabuilding,thelocalplanningauthoritymay
givewrittendirectionstotheapplicantinrespectofanyofthefollowingmatters,thatis:
(g)anyothermatterthatthelocalplanningauthorityconsidersnecessaryforpurposesof
Anapplicationforplanningpermissioninrespectofadevelopmentshallbemadetothelocal
planningauthorityandshallbeinsuchformandshallcontainsuchparticularsandbe
accompaniedbysuchdocuments,plans,andfeesasmaybeprescribed.

13. BerdasarkanSeksyen5(AktaPerwakilanKuasa1956:Akta358),Menteri
mewakilkankuasanyadibawahSeksyen85:AktaPengangkutanJalan1987
berkenaanJalanPersekutuankepadaPegawaiyangdiperturunkanbagi
meluluskanpermohonanuntukmembinajalanmasukkeJalanPersekutuan
kepadaPengarahNegerimelaluiWartaKerajaanP.U.(B)44.
RELEVANTLAW/ REGULATION
ATJ3/2011GarisPanduanUntukMemproses
Permohonan
Persekutuan
Pembangunan Tepi Jalan
[RSD]
Klausa1.3PegawaiYangDiberiKuasaMeluluskanPermohonan
Penetapanjenispersimpanganyangdiadakanmestilahatauberasaskankepada
jumlahlalulintasyangakandijanakan.Untukskimpembangunan yang
melibatkanlebihdaripada200unitdwellersatau4,100meterpersegi
keluasanlantaikasar(grossfloorarea)pembangunan komersial,satu
laporanpenilaianimpaklalulintasolehJuruteraProfesionalwajibdisediakan.
Klausa2.1.7 -PolisiAm (Pembangunan TepiJalan)

14. BORANGATJ03/85PINDAAN06/2008(03)

15. PARTIESINVOLVEDINTIA
1.Developer
2.ApprovingAuthority
3.Traffic EngineeringConsultant

16. PARTIESINVOLVEDINTIA-Developer
1.ResponsibleforengagingaTraffic EngineeringConsultantto carryout
theTIA forhisdevelopment or re-development.
2.Developer shallliaisewithApprovingAuthority at theearlystage of
planningthedevelopment inorderto ensure that the type andscaleof
theproposalissuitablefor thesiteunder consideration.
3.Theymustalsoliaisewithroadandtransportauthoritiesto
demonstratethe trafficplanningforthedevelopment andto identify
any possibleadverse trafficimpacts.
4.Traffic EngineeringConsultantshouldbe appointedby Developerat the
planningstageoftheproject sothat professionalinputswithregards
to trafficissues canbe usedby theplanners/architectstodevelop the
preliminarysite/layoutplans.
5.Developer shallnot influenceor interferewiththeprofessional workof
theTraffic EngineeringConsultant.
6.Developer shallimplementthe infrastructure improvement and
mitigationmeasuresasrequiredbyApprovingAuthority.

17. PARTIESINVOLVEDINTIA-ApprovingAuthority
1.ApprovingAuthorityhasaregulatoryroleintheTIAprocessinrelationto
land-useplanning,androadsandtransportinfrastructuredevelopment.
Itshouldencouragepre-applicationdiscussionswiththeDeveloperorTraffic
EngineeringConsultanttosteertheTIAstudy,identifytheStudyArea,
includinggivingdirectiononsourcesofinformation,goodpracticeadvice,
andclearguidanceonwhattheDeveloperorTrafficEngineeringConsultant
maybeexpectedtoprovideinaccordancewithtransportstrategyofthe
authority.
TheTIAreportwillprovideApprovingAuthoritywiththerelevantinput,
relatingtotrafficsituationforecastandmitigationmeasures,forAuthority’s
considerationofDeveloper’sapplicationforplanningpermissionapproval.
Whereappropriate,ApprovingAuthoritymayuseinformationintheTIA
reportasabasisfordeterminingthecostsharingoffutureinfrastructure
improvementsbetweendevelopers.
WhereanApprovingAuthoritydoesnothavein-housecapacitytoevaluate
theTIAreport,itmayengageanindependentTrafficEngineering
Consultanttoevaluateorreviewthereportsonitsbehalf.
2.
3.
4.
5.

18. PARTIESINVOLVEDINTIA-T.E.C
1.TrafficEngineeringConsultantcanbeaProfessionalEngineer
withPractisingCertificate(PEPC)orateamofspecialistsina
firmledbyaqualifiedPEPC.
TrafficEngineeringConsultantwhohasbeencommissioned
bytheDevelopertocarryouttheTIAshallactindependently
andprofessionally,withoutinterferenceor influencefrom
anyparty.TrafficEngineeringConsultantshalldirectlyor
indirectlylookaftertheinterestsofthegeneralpublic and
thelocalcommunity.
TrafficEngineeringConsultantshallevaluatetheplanning
anddesignoftheprojectinpromotingsustainablemodesof
transportation.Optimisationofroadcapacitybymeansof
trafficmanagement measuresshouldbe carefullystudied
andtakenintoconsideration.
2.
3.

19. CRITERIAFORTHEAPPOINTMENTOFTRAFFIC
ENGINEERINGCONSULTANT
1.AqualifiedCivilEngineerspecializingintraffic/highway/
transportengineeringwhois registeredwiththeBoardof
Engineers,Malaysiaas aPEPC;
2.
haveminimumofsix(6)years’experienceintraffic engineering,of
whicha minimumof three(3) years’ experienceinTrafficImpact
Assessment(TIA);and
3.haveattendedaformaltrainingcourseinTrafficStudy/TIAe.g.:
CourseonTIA,TrafficStudy,TripGenerationManual, Traffic
EngineeringSoftwareandothersthatare organizedbytheBoard
ofEngineerMalaysia(BEM),PublicWorks DepartmentMalaysia
(JKR),orotherapprovedbyBEM/JKR suchastheHighway
PlanningDivision(HPD)MinistryofWorks, MalaysianHighway
Authority(LLM),Institute of Engineers Malaysia(IEM),Instituteof
HigherLearning,Malaysiaand RoadEngineeringAssociation
Malaysia(REAM).

20. REGISTRATIONOFTRAFFICENGINEERING
CONSULTANTFIRM
✓The Traffic Engineering Consultant Firm must be
registered with the Ministry of Finance (MOF) under the
Traffic Study (Kajian Trafik) code (340202) or the
Transport Network (Kajian RangkaianPengangkutan)
code (340201) whichever is applicable or whatever
relevant to traffic engineering as required by MOF.

21. TIAPROCESS
DEVELOPER
TRAFFICENGINEERING
CONSULTANT
DEVELOPER/TRAFFICENGINEERING
CONSULTANT/TOWNPLANNER
Iflayoutplanismodified
Ifonlymitigation
measuresaremodified
Developertomodify layout
planormitigationmeasures
wherenecessary
EvaluationofTIA
reportby Approving
Notacceptable
OK
TIA approvedby Approving
Authority
TIA reportreturnedto
Developerwithqueries
orcomments by
Approving Authority
IncludeinDevelopmentProposal
Report for submissionto
Approving AuthorityforPlanning
Permission
FinaliseTIAreport
Reviewandmodify sitelayout
planwherenecessary
Carry outTIA
Preparationofpreliminarysite
layoutplan
Engageconsultants,including
TrafficEngineeringConsultant
Commencementof
DevelopmentPlanning

22. REQUIREMENTFORTIA?
❑Whenadevelopmentgeneratesaspecifiednumberof
peakhourtrips.
❑Whenadevelopmentgeneratesaspecifiednumberof
dailytrips.
❑Whenadevelopmentcontainsaspecifiednumberof
dwellingunitsorspecifiedbuilt-upfloorarea.
❑Whenadevelopmentoccursinasensitivearea.
❑Atthejudgmentordiscretionoftheappropriate
authoritiesunderunusualsituation.

23. TIATRIGGERLEVEL
deemednecessary
CRITERIA TRIGGERLEVELS
PeakHourTripGeneration
(Commuterpeak)
150addedvehiclesperhour(2-Way)
Off-PeakHourTripGeneration
(Generatorpeakoccursattheoff-peakperiod)
200addedvehiclesperhour(2-Way)
Sizeof residentialdevelopment 200dwellingunits
Sizeof commercialdevelopment 45,000sq.ft.(grossfloorarea)
RequirementofApprovingAuthority
Mayimposespecifictriggerlevels as

24. SCOPE OF TIA
❑Definitionofthestudyarea/boundary.
❑Determiningexistingtrafficcondition/pattern,which
includesprimaryandsecondarydatacollection.
❑Informationonfuturelanduseandcommitted
developmentinsurroundingareaofproject.
❑Tripforecastingwithsequentialstepsoftripgeneration,
tripdistributionandtripassignment.
❑Analysisofimpactsontrafficinareaofstudy.
❑Mitigationmeasuresproposals.

25. TIA APPROACH
•DataCollection
Stage1
•AnalysisofExistingTrafficConditions
Stage2
•ForecastingofFutureTrafficDemand
Stage3
•EvaluationofFutureTrafficConditions
Stage4
Therearefour(4)mainstagesinvolvedintheTIAprocess

26. TIAAPPROACH
▪Comprehensivereviewofliteraturestudy,coveringall
documentsandtechnicalreportspertainingtoall
existingandproposeddevelopmentssurroundingthe
developmentarea.(RelevantLocalPlanandStructure
Plan,InfrastructureandTransportationPlans,etc.)
▪Consultationshavetobecarriedoutwiththelocal
authorityandrelevantbodiesresponsibleforany
adjacentdevelopmentprojectstogathernecessary
informationconcerningtheoveralldevelopment
surroundingtheproposedprojectsite.
▪Sitevisittodetermineexistingtrafficconditions,
existingtrafficandpedestrianissuesandproblems,
andobtaininginformationonthesurroundingroad
network,junctionsandlanduses.
▪Demarcationofthestudyarea(toconsultfromthe
ApprovingAuthority);
▪TheClassifiedCount(CC)surveyistobeconductedat
peakhoursthatisdeterminedbasedon12or16hours
trafficcount.
Stage1-
DataCollection

27. EXAMPLE OF STUDY AREA
JALAN KELUAR/MASUK
JALAN PERSEKUTUAN KL-
IPOH (FT001)
KUARTERS
KELAS C & D
KUARTERS KELAS E &
F
IBU PEJABAT POLIS

28. EXAMPLE OF STUDY AREA
J1
J2
J3
PROPOSED
DEVELOPMENT

29. TIAAPPROACH
▪AllrelevantdatacollectedinData
CollectionStageistobeusedinStage
2,whichisanalysisoftheexisting
trafficdata.
▪Upondataprocessing,theexisting
trafficdistributionpatternscanbe
identified.Therelationshipofthe
trafficpatternandlanduse
developmentpatternisalso
determinedatthisstage.
▪Theunderstandingandestablishment
oftheexistingtrafficpatternisvitalfor
forecastingfuturetrafficdemand.
Stage2 -
AnalysisofExisting
TrafficPatterns

30. TIAAPPROACH
▪Inforecastingthefuturetrafficgrowthinanarea,
itisafunctionofdemographywhichinvolvesthe
planningvariablessuchaspopulationgrowth,
employmentsupply,vehicleownership,
committedandfuturepropertydevelopments
andfutureroadnetwork.
▪Thefuturetripgenerationiscalculatedbasedon
theaboveinputsandempiricaltriprateswhichis
establishedbytheHighwayPlanningDivision,
MinistryofWorksMalaysiaandotherrelevant
studies.Inforecastingthefuturetraffic,itis
necessarytodeterminethedesignyearforwhich
theanalysisoffuturetrafficistobeundertaken.
▪Trafficgeneratedfromtheproposedandadjacent
developmentsareoverlaidonthedesignyear
trafficforecasttoproducethetotaltrafficvolume
fortheImpactAnalysisYear(IAY).
Stage 3 -
Forecasting
of Future
Traffic
Demand

31. ROAD TRAFFIC VOLUME MALAYSIA
(TRAFFIC GROWTH RATE)

32. TIAAPPROACH
▪Roadlinkandintersectioncapacitieshavebeen
assessedtodeterminewhethertheenvisaged
roadnetworkwouldbeabletoaccommodatethe
trafficdemand.
▪Basedonthetrafficflowforecasts,
recommendationshavebeenmadeonthe
numberandlocationsofingress/egresspoints
requiredtoservicethefulldevelopmentandthe
formofaccessintersectionsrequired.
▪Possiblelocationsforaccesspointsontothe
existingroadnetworkneedtobesuggested,
takingintoaccounttheintersectionspacing
standardssoastoprovideanefficienttraffic
circulation.
Stage 4 –
Evaluation
of Future
Traffic
Conditions

33. TIAAPPROACH(FLOWCHART)

34. TRAFFICDEMANDFORECASTINGPROCESS
TRIPGENERATION (Howmanytrips beginor endat anactivity?)
TRIPDISTRIBUTION(Howmanytrips willbe madebetweenactivities?)
TRIPASSIGNMENT (Over whichroutes willtrips betweenactivitiesbemade?)

35. TRIPGENERATION(Howmanytripsbeginor end atan activity?)
R
O
A
D
3
ZONEA
PROPOSED
DEVELOPMENT
ZONEB

36. TRIPGENERATION

37. TRIPGENERATION
If the siteconditiondiffersfromthat
inMalaysian Trip Generation Manual
(MTGM),thenitisnecessarytocollect
dataatsitesofsimilarconditionto
producetripgenerationratesand
accepted by Approving Authority.
35/
21

38. TRIPDISTRIBUTION(Howmanytripswillbe madebetweenactivities?)
PROPOSED
ZONEA
R
O
A
D
3
ROAD1
DEVELOPMENT
40%TRIP
ZONEB

39. TRIPASSIGNMENT(Overwhich routeswill tripsbetweenactivitiesbemade?)
R
O
A
D
3
20
0
T
R
I
P
S
ZONEA
PROPOSED
DEVELOPMENT
ZONEB

40. IMPACTANALYSISYEAR(IAY)
Base Year
(BY)
•Thecalendaryearinwhich
theTIAStudyis carried out.
Impact
Analysis
Year (IAY)
a)IAY is to be 10 years after
projected CY.
b)If CY is more than 10 years from SY (for
staged development), in addition to (a),
IAY shall include an interim analysis for
the CY.

41. IMPACTANALYSISYEAR(IAY)
Submission
Year(SY)
•ThecalendaryearinwhichtheDeveloper
submitshisDevelopmentProposalReport
to the Approving Authority for Planning
Permission.
Completion
Year(CY)
•The calendar year in which the proposed
development is fully completed and
operational. If the project is divided into
phases, CY refers to the year the final
phase is completed and operational.

42. • Proposed development fully completed and
operational.
• Projected traffic volume with 3 scenarios:
a) Without development (Non-Site Traffic only)
b) With development (Non-Site Traffic + Site
Traffic)
c) With development and mitigation measures
• Assessment and mitigation for access,
intersection delay, road link capacity, and
transport infrastructure.
* Note:
-Project completion period (inclusive of time
taken for Planning Permission Approval to be
obtained and actual construction works) is
assumed to be 2 years & commencement of
project immediately after Planning Permission
Approval obtained in SY. However, if project
completion period is expected to be more
than 2 years, this will have to be determined
and reflected accordingly in the TIA Report.
-For staged developments, traffic impact must
be assessed during operational year for each
stage.
•Proposed development
project information
(Development location,
type, component,
density, planned
completion date, etc.)
for the base (current)
year.
• Data Collection (Traffic
count, road
characteristics, average
annual traffic growth
rate, etc.)
• Existing/Current Traffic
Condition (AM Peak,
PM Peak) –known as
Baseline Traffic
Condition
TIAMILESTONES
CY IAYSYBY
•Forecast the traffic impacts 10
years upon completion.
•Projected traffic volume with 3
scenarios:
a)Without development (Non-
Site Traffic only) –known as
Baseline Traffic Condition
in IAY
b)With development (Non-Site
Traffic + Site Traffic)
c)With development and
mitigation measures
•Assessment and mitigation for
access, intersection delay, road
link capacity, and transport
infrastructure.
•Submission of
Development
Proposal Report
(TIA Report) to
Approving Authority
for Planning
Permission
Approval.
* Note:
Validity period of TIA
Report is 2 years
from the date of TIA
study in BY. If more
than 2 years, the TIA
Report must be
updated to reflect the
latest traffic
conditions of the
locality.
ProjectionYear
(e.g.2030)
CompletionYear
(e.g.2020)
SubmissionYear
(e.g.2018)
BaseYear
(e.g.2017)

43. TRAFFIC CONDITIONTO BEACHIEVEDAFTERMITIGATIONMESURES
*WheretheBaselineTrafficConditioninIAYisatLOSE,thetargetmitigatedLOSshallalsobeD.
however,wheresiteconditionisveryrestrictiveandtheApprovingAuthorityisconvincedthatthe
highestLOSachievableaftermitigationmeasuresislevelE,theApprovingAuthoritymayconsider
allowinganexemptionoftheLOSDrequirement.
**BASELINETRAFFICCONDITIONINIAYreferstotrafficconditionwithoutdevelopmentinIAY.
IAYmeansImpactAnalysisYear.
IAYis tobe10yearsaftertheprojectedCY.
***Theserequirementsareapplicabletoroadsegmentsandeachelementof theintersectionsindividually.
BASELINETRAFFICCONDITIONIN
IAY(LOS)**
MINIMUMTRAFFICCONDITION(LOS)
AFTERMITIGATION
A C
B C
C C
D D
E D(ExceptionE)*
F D(ExceptionE)*

44. LOSINDICATOR
➢Foreachindividualintersection,LOSofeachlanegroupofall
approachesshallbepresentedindividually.OverallLOSofan
intersection,thoughusefulasanindicatoroftheoverall
performanceofthatintersection,isnotrelevantinTIAstudy.
ApartfromtheLOS,therespectivedegreeofsaturation(v/c
ratios)aswellasthemaximumqueuelengthsanddelayshall
alsobecomputedandpresented.
➢LOSprovidesanindicationormeasureoftheoperational
conditionofthefacilityconcerned.Arangefrom“A”to“F”is
applicable;LOS“A”representsanexcellentlevelof
operationalcondition,whileLOS“F”anundesirable,
exceedinglycongestedandfailedsituation.

45. Road/Mid-block
•Two (2) primary measures used to describe the service quality of a
road or highway.
•These are:
(1) (PTSF) Percent Time-Spent-Followinganother vehicle, &
(2) (ATS) Average Travel Speed (km/h).
Intersection
•Defined in terms of delay(kelengahan) as a measure of:
•Driver discomfort
•Driver frustration
•Fuel consumption
•Lost travel time
LEVELOFSERVICEDEFINITION

46. LEVELOFSERVICEDEFINITION
-2lanehighway

47. LEVELOFSERVICEDEFINITION
-Multilane highway

48. LEVELOFSERVICEDEFINITION
-BasicSegmentExpressways

49. LOS –RTVM 2018

50. LOS –UNSIGNALIZED INTERSECTION

51. LOS –SIGNALIZED INTERSECTION

52. MITIGATIONMEASURES
1.Wheretheanalysisshowsthattherewillbenegativeimpact,
mitigationmeasuresmustbeproposedtoupgradethe
roadfacilitiesatthatlocationsoastoachievethe
requirementssetoutinthisGuideline.Thisproposal,asdecided
byApprovingAuthority,withtheindicativecostsofland
acquisition,designandconstructionofmitigationmeasure
whichshallbebornebytheDeveloper,shallbeincludedinthe
submissionforthePlanningPermission.
2.Indevelopingmitigationmeasures,possibleimprovementsin
relationtositeaccess,geometry,trafficsignaltiming,new
facility,trafficmanagementandotheroperationalissuesshould
beinvestigated.
3.Whenreasonableimprovementscannotsufficientlymitigate
theresultingimpactsfromthedevelopment,areviewofthe
proposeddevelopmentintermsofprojectsize,landuse,
developmentdensityorplotratioshouldbecarriedout,witha
viewtolessenorreducethelevelofsuchimpactstowithinthe
acceptablelevel.

53. MITIGATIONMEASURES
–Change the intersection layout
oIncrease number of lane(s)
oChange the lane sharing (vehicles movement)
oProvide acceleration, deceleration and storage
lane(s)
–Upgrading
oFrom unsignalized to signalized junction
oFrom roundabout to signalized roundabout
oFrom roundabout to signalized junction
oFrom signalized junction to interchange (grade
separation)
–Re-study the Phasing & Timing if signalized junction is
involved

54. VALIDITYPERIODOFTIA
TWO (2)YEAR
FROM DATE OF TIA STUDY
INBASEYEAR

55. CONTENTOFTIAREPORT
1.ReportCover
2.ExecutiveSummary
3.Introduction
4.Defining The StudyArea/ Boundary
5.Determining ExistingTraffic
6.LandUse Study
7.Trip Generation
8.Impact Analysis
9.MitigationMeasures
10.Conclusions

56. REPORTOUTLINE
TRAFFIC IMPACT ASSESSMENT (TIA) TRAFFIC STUDY
A.INTRODUCTION
•Project Background
•Study Objectives
•Study Methodology
•Site Location
B.EXISTING TRAFFIC CONDITION
•Traffic Survey
•Result Of Traffic Survey
•Assessment Of Existing Roads
•Assessment Of Existing Junctions
C.FUTURE TRAFFIC FORECAST
•Proposed Development Component
•Trip Generation
•Trip Distribution
•Trip Assignment
D.ANALYSIS OF FUTURE TRAFFIC SCENARIO
•Analysis of Future Traffic Scenario
•Mainline Capacity Analysis (LOS)
•Junction Capacity Analysis (LOS)
E.SUMMARY AND FINDINGS
•Existing Traffic Conditions
•Forecast Of Development Traffic
•Forecast Of Future Traffic
•Analysis Of Future Scenario (Impact Analysis
Year)
•Recommendations
A.INTRODUCTION
•Project Background
•Study Objectives
•Study Methodology
•Site Location
B.EXISTING TRAFFIC CONDITION
•Traffic Survey
•Result Of Traffic Survey
•Assessment Of Existing Roads
•Assessment Of Existing Junctions
C.ANALYSIS OF FUTURE TRAFFIC SCENARIO
•Analysis of Future Traffic Scenario
•Mainline Capacity Analysis (LOS)
•Junction Capacity Analysis (LOS)
D.SUMMARY AND FINDINGS
•Existing Traffic Conditions
•Forecast Of Development Traffic
•Forecast Of Future Traffic
•Analysis Of Future Scenario (Impact Analysis
Year)
•Recommendations

57. REFERENCES
1)RoadTrafficVolumeMalaysia(RTVM)
2)MalaysiaHighwayCapacity Manual (2006
&2011)
3)ArahanTeknik(Jalan)ATJ 38/2018 –
Guidelines for TIA
4)Malaysia Trip Generation Manual 2010
5)ArahanTeknik(Jalan)ATJ8/86-AGuideonGeometricDesign
ofRoads(Pindaan2015)
6)ArahanTeknik(Jalan)ATJ3/2011-GarisPanduanUntuk
MemprosesPermohonanPembangunanTepiJalanPersekutuan
7)ArahanTeknik(Jalan)11/87-AGuidetotheDesignofAt-
Grade Intersections(Pindaan2017)
8)ArahanTeknik(Jalan)13/87-AGuidetotheDesignofTraffic
Signal(Pindaan2017)
9)Anyrelevantinternationalguidelines

58. THE WAY FORWARD
1.AdoptionofMalaysiaStandardincapacity
andLOScalculation.
2.Thetrafficimpactsweptpathanalysis
especiallyfortrafficcirculationwithinsite
shallbeconducted,ifrequiredbyApproving
Authority.
3.Trafficsimulationmodellingshallbeprovided
bytheconsultantifrequiredbyApproving
Authority.

59. LESSON
LEARNT
Project’s
Scope
Outcome
Time
Project’s
CostProject initial cost
should consider the
output from the
traffic study
Scope of project
needs to take into
accountthe
recommendations
of traffic
Objectives of
the project are
fully achieved
Reduce time at
design level

60. THANKYOU