In areas near busy international crossings one downside to Canadians having to cross the border to pick up packages and mail can be traffic jams. This photo shows traffic on a holiday weekend at Blaine, Washington, where I-5 crosses in to British Columbia. Canadians often have to figure the best times to cross the border if they have a USPS postal box or use an address at a private U.S. parcel service to receive shipped items.