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We analyze radio bursts observed in events with interacting/non-interactingCMEs that produced major SEPs (Ip $>$ 10 MeV) fromApril 1997 to December2014.We compare properties of meter (m), deca-hectometer (DH) type II as wellas DH type III bursts, and time lags for interacting-CME-associated (IC) eventsand non-interacting-CME-associated (NIC) events. About 70\% of radio emissionswere observed in events of both types from meters to kilometers. We found highcorrelations between the drift rates and mid-frequencies of type II radiobursts calculated as the mean geometric between their starting and endingfrequencies for both NIC and IC-associated events (Correlation coefficient\textit{R}$^{2}$ = 0.98, power-law index $\varepsilon$ = 1.68 $\pm $ 0.16 and\textit{R}$^{2}$ = 0.93, $\varepsilon$ = 1.64 $\pm $ 0.19 respectively).We alsofound a correlation between the frequency drift rates of DH type II bursts andspace speeds of CMEs in NIC-associated events. The absence of such correlationfor IC-associated events confirms that the shock speeds changed in CME--CMEinteractions. For the events with western source locations, the mean peakintensity of SEPs in IC-associated events is four times larger than that inNIC-associated SEP events. From the mean time lags between the start times ofSEP events and the start of m, DH type II, and DH type III radio bursts, weinferred that particle enhancements in NIC-associated SEP events occurredearlier than in IC-associated SEP events. The difference between NIC events andIC events in the mean values of parameters of type II and type III bursts isstatistically insignificant.

Analysis of type II and type III radio bursts associated with SEPs from non-interacting/interacting radio-loud CMEs