Complex sentence: Hanley and Latcha roads were truncated to dead-end just before the freeway, but access to both roads was retained by construction of a new interchange and service drives in the early 1970s; the Ayers and Lemoyne crossings were also upgraded to overpasses at this point.
Split into simpler sentences: Hanley and Latcha roads were truncated to dead-end just before the freeway, but access to both roads was retained by construction of a new interchange and service drives in the early 1970s. The Ayers and Lemoyne crossings were also upgraded to overpasses at this point.