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I



I
interstate

IAC

Iowa Administrative Code

IADA
Iowa Automobile Dealer's Association

IAIS
Iowa Interstate Railroad Ltd.

IANR
Iowa Northern Railway Company

IAPS
Iowa Automated Purchasing System
Iowa Automated Permitting System

IASP
Iowa Aviation System Plan

IATR
Iowa Traction Railroad Company

IA zone
initial acceleration zone

IBRC
Innovative Bridge Research and Construction program

IBRD
Innovative Bridge Research and Development program

IC
incidental construction

ICAAP
Iowa's Clean Air Attainment Program

ICEA
Iowa County Engineers Association

ICEOO
Iowa County Engineer's Office Organization

ICN
Iowa Communications Network

ICPA
Iowa Concrete Paving Association

IDMS
integrated data management system

IEDA
Iowa Economic Development Authority (former name was Iowa Department of Economic Development [Iowa DED])

IDNR
Iowa Department of Natural Resources

IFAS
Iowa Financial Accounting System

IFTA
International Fuel Tax Agreement

IGRA
Iowa Good Roads Association

IIHS
Insurance Institute for Highway Safety

IIM
Iowa in Motion

IJR
interchange justification report

ILEA
Iowa Law Enforcement Academy

ILPA
Iowa Limestone Producers Association

IM
instructional memorandum

IMRL
I & M Rail Link, LLC

IMS
intermodal management system

IMTA
Iowa Motor Truck Association

InTrans
Institute for Transportation (at Iowa State University)

IP
information plan

IPERS
Iowa Public Employees Retirement System

IPPE
Individual Performance Plan and Evaluation

IPTA
Iowa Public Transit Association

IRI
International Roughness Index

IRP
International Registration Plan

IRVM
integrated roadside vegetation management

ISAC
Iowa State Association of Counties

ISBL
in-service brightness level

ISD
intersection sight distance

ISTEA
Intermodal Surface Transportation Efficiency Act of 1991

IT
information technology

ITE
Institute of Transportation Engineers

ITS
intelligent transportation systems

ITSA
Intelligent Transportation Society of America

IVHS
intelligent vehicle highway systems

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J



JARC
Job Access Reverse Commute (program)

Jct
junction

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K



KJRY
Keokuk Junction Railway Company

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L



LAN
local area network

LCCA
life cycle cost analysis

LCL
less-than-container load

LCV
longer combination vehicles

LD
light-duty [bus]

LDI
locally determined income

LEF
load equivalency factor

LEP
limited-English proficiency

LI
Legibility Index

LiDAR
light detection and ranging

LF
low frequency

LKS
like kind substitution

LNG
liquefied natural gas

LOS
level of service

LPA
local public agency

LPAC
local public agency coordinator

LPG
liquefied petroleum gas

LRFA
Local Rail Freight Assistance program

LRIS
linear referencing information system

LRS
linear referencing system

LRTF
Living Roadway Trust Fund

LRTP
Long-Range Transportation Plan

LTD
long-term disability

LTL
less than truckload

LUST
leaking underground storage tank

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M



M85
methanol 85 percent, gasoline 15 percent

MAGLEV
magnetic levitation (national high-speed ground transportation)

MARS
mobile accident reporting system

MAASTO
Mid American Association of State Transportation Officials

MBE
minority business enterprise

MCSAP
Motor Carrier Safety Assistance Program

MIDP
mortgage interest differential payment

MIS
Management Information System

MOEs
measures of effectiveness

MOA
memorandum of agreement

MOU
memorandum of understanding

mp
milepost

mpg
miles per gallon

mph
miles per hour

MPO
metropolitan planning organization

MRO
medical review officer

MRVD
Minimum required visibility distance

MSC zone
Merge steering control zone

MSDS
Material Safety Data Sheet

MSL
minor school license

MTAP
Multi-State Technical Assistance Program

MTIP
Metropolitan Transportation Improvement Program

MUTCD
Manual on Uniform Traffic Control Devices

MV
market value

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N



NAAQS
National Ambient Air Quality Standards

NADA
National Automobile Dealers Association

NAFTA
North American Free Trade Agreement

NBI
National Bridge Inventory

NBIS
National Bridge Inspection Standards

NCHRP
National Cooperative Highway Research Program (part of the Transportation Research Board)

NEPA
National Environmental Policy Act of 1969

NF
New Freedom (Program)

NGA
National Governors Association

NHI
National Highway Institute

NHS
National Highway System

NHTSA
National Highway Traffic Safety Administration

NIMBY
not in my backyard

NIMS
National Incident Management System

NIOSH
National Institute for Occupational Safety and Health

NLT
not later than

NOI
notice of intent

NOV
notice of violation

NPIAS
National Plan of Integrated Airport Systems

NRCS
National Register of Historic Places

NRTF
National Recreational Trails Fund

NRVC
Nonresident Violator Compact

NS
Norfolk Southern Railway Company

NSBA
National Steel Bridge Alliance

NTCIP
National Transportation Communications ITS Proposal

NTOR
no turn on red

NTS
National Transportation Statistics
National Travel Statistics

NTSB
National Transportation Safety Board

NWS
National Weather Service

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O



OD
origin-destination

ODAPC
Office of Drug and Alcohol Policy and Compliance (U.S. DOT)

OIG
Office of Inspector General

OL
Operation Lifesaver

OLI
Operation Lifesaver Inc.

O/O
owner occupant

ORV
off-road vehicle

OSHA
Occupational Safety and Health Administration

OT
overtime

OTRB
Over-the-Road Bus Accessibility Program

OWI
operating while intoxicated