Small Aircraft; Low Wing; 1 Eng; Fixed Gear
Flight Crew Private
Flight Crew Last 90 Days 60; Flight Crew Total 160; Flight Crew Type 150
ATC Issue All Types; Conflict NMAC
Flight Crew Took Evasive Action
Airspace Structure; Human Factors; Environment - Non Weather Related
Was flying on Los Angeles Special Flight Rules (LASFR) northbound at 4500 [feet] when my ADS-B in system gave me a traffic warning coming from the right side. The traffic was ascending into me on a current collision course. [It] looked like a Cirrus or Bonanza and were much faster than me. I tried to call them on LASFR frequency to no avail. They continued on about a 75-degree angle directly towards my route of flight. The scary part was that they were heading directly towards me but also ascending into me at the same time. They were traveling much faster than me and guessing from their speed and my speed we were on a direct collision course. I was on a special use airway in Bravo airspace and was originally nervous to descend due to possible on-coming traffic from the opposite direction as well as fear of violating Bravo airspace. Since they were ascending from underneath me I had no visual contact with them (I was in a low wing aircraft). My ADS-B system continued to give me hazard and collision warnings. I turned left to avoid them; but they seemed to turn left immediately after I did and now again were on collision course. My ADS-B system warned me that they were now within less than half a mile from me and were at the exact same altitude as me; going much faster. I still could not see them visually so at the last second I cut my power and dove about 400ft and hard left to avoid them. I now immediately saw them visually; pass overhead right above me. Since I had dived a few hundred feet they were a bit higher now and were no factor. The whole experience just overall shook me a bit but I am doing fine now. I believe one of the biggest issues of this possible collision was that nobody was warning them for traffic; as well as them not looking for me. Since I was on an uncontrolled special use frequency and was not on flight following during the Bravo transition (it is not provided there; although I was squawking 1201 which is mandated); nobody was warning me of traffic. Since I was higher than the oncoming aircraft and they were coming from my right side; if it were not for my ADS-B in system; I absolutely would not have been able to see them visually. I believe a human factor involved that did startle me more was that my ADS-B system kept beeping and flashing and trying to warn me which only incited more fear; although this was good at the moment because I took evasive action; it made me feel more startled afterward. If the oncoming plane was on flight following or an IFR flight plan; then they absolutely should have been warned about me; if they were simply flying VFR then they failed to scan for traffic and failed to see me. Overall; the incident was just more startling/scary than anything; I wouldn't usually expect anything like this to happen in such well-controlled airspace; especially since this happened within Bravo airspace (to note; they were not on the special use corridor that I was on; they were departing to the west over the ocean; so they were flying in Bravo airspace on non-special use airspace.) I wanted to just report this to get it off my chest; as well as a few friends of mine recommending I do this.
Light aircraft pilot reported an NMAC with another light aircraft in LAX Class B airspace.