Traffic watch pilot in a C172 inadvertently flew through class B airspace due to believing he was following a freeway outside of the airspace at his altitude.

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Attributes
ACN	432610
Time
Date	199904
Day	Fri
Local Time Of Day	0601 To 1200
Place
Locale Reference	airport : lax.airport
State Reference	CA
Altitude	msl single value : 1800
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	tracon : sct.tracon
Operator	Other
Make Model Name	Skyhawk 172/Cutlass 172
Operating Under FAR Part	Part 91
Navigation In Use	other
Flight Phase	cruise : level
Flight Plan	None
Person 1
Affiliation	company other
Function	flight crew : single pilot
Qualification	pilot : commercial pilot : cfi
Experience	flight time last 90 days : 175 flight time total : 1100 flight time type : 900
ASRS Report	432610
Person 2
Affiliation	government : faa
Function	controller : approach
Qualification	controller : radar
Events
Anomaly	airspace violation : entry non adherence : far other spatial deviation
Independent Detector	other flight crewa
Resolutory Action	none taken : detected after the fact
Supplementary
Problem Areas	Flight Crew Human Performance
Primary Problem	Flight Crew Human Performance
Air Traffic Incident	Pilot Deviation

Narrative:

I was flying for a traffic watch company at the time of the incident. While doing that, I accidentally confused the 110 freeway with the 710 freeway due to the fact both freeways run north/south and both freeways start and end roughly at the same point. Flying along the 110 freeway puts me in class B airspace for lax, which I entered without their permission. No conflicts with other traffic occurred during this period.

Original NASA ASRS Text

Title: TFC WATCH PLT IN A C172 INADVERTENTLY FLEW THROUGH CLASS B AIRSPACE DUE TO BELIEVING HE WAS FOLLOWING A FREEWAY OUTSIDE OF THE AIRSPACE AT HIS ALT.

Narrative: I WAS FLYING FOR A TFC WATCH COMPANY AT THE TIME OF THE INCIDENT. WHILE DOING THAT, I ACCIDENTALLY CONFUSED THE 110 FREEWAY WITH THE 710 FREEWAY DUE TO THE FACT BOTH FREEWAYS RUN N/S AND BOTH FREEWAYS START AND END ROUGHLY AT THE SAME POINT. FLYING ALONG THE 110 FREEWAY PUTS ME IN CLASS B AIRSPACE FOR LAX, WHICH I ENTERED WITHOUT THEIR PERMISSION. NO CONFLICTS WITH OTHER TFC OCCURRED DURING THIS PERIOD.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.