飛(ひ)行(こう)機(き) hikoukiは wa車(くるま) kurumaより yori安(あん)全(ぜん) anzenだ daと toいう iuの noが ga彼(かれ)の() kareno考(かんが)え() kangaeだ da。 It's his belief that planes are safer than cars. Literal Airplane [topic-は] car [than-より] safe [copula-だという] [topic-のが] his thinking [copula-だ]. というのが彼の考えだ frames the preceding clause as 'his belief.' より marks the comparative. A reported opinion about transportation safety. opinionstransportation~より (comparative)~という (called/named)
飛(ひ)行(こう)機(き) hikoukiは wa車(くるま) kurumaより yori安(あん)全(ぜん) anzenだ daと toいう iuの noが ga彼(かれ)の() kareno考(かんが)え() kangaeだ da。 It's his belief that planes are safer than cars. Literal Airplane [topic-は] car [than-より] safe [copula-だという] [topic-のが] his thinking [copula-だ]. というのが彼の考えだ frames the preceding clause as 'his belief.' より marks the comparative. A reported opinion about transportation safety. opinionstransportation~より (comparative)~という (called/named)