Yeah GT Road needs 2 alternate expressways/ highways to offload heavy traffic it encounters 24*7*365. It gets further slowed down between Ludhiana and Amritsar due to road condition itself although traffic is 60-70% less compared to Delhi-Ambala stretch. It is heaviest in Karnal-Delhi stretch, only able to manage due to excellent road condition.
Katra expressway and Chandigarh expressway (on Yamuna range in Haryana/UP border) should help in decongesting GT Road.