U.S. and Canadian border authorities are warning that delays of up to an hour might be experienced by people crossing between St. Lawrence County and Canada this Labor Day weekend.

U.S. Customs and the Canada Border Services Agency are anticipating heavy traffic at the Massena and Ogdensburg bridges.

The Canadian agency expects peak border crossing in Ogdensburg between 2 and 8 p.m. Friday and Saturday, between 4 and 9 p.m. Sunday, and between noon and 10 p.m. Monday.

Peak times in Massena are expected to be between 10 a.m. and midnight Friday, noon and midnight Saturday, 2 p.m. and midnight Sunday, and between 10 a.m. and midnight Monday.

Border wait times may exceed 60 minutes, according to Canadian staffers.

Travelers should be prepared for inspection before arriving at the crossing booth. Have an accepted form of documentation readily available and be prepared to declare items purchased abroad.

Accepted documentation includes Western Hemisphere Travel Initiative or RFID Radio Frequency Identification enabled documents

Customs staffers also recommend turning ending all cell phone conversations before reaching the booth, rolling down windows, and removing sunglasses and hats.

Staffers also recommend allowing extra time for border crossings in case of heavy traffic. Information on current border traffic conditions is available at www.cbp.gov or www.cbsa.gc.ca/ and www.cbsa.gc.ca/bwt-taf/menu-eng.html.

For more information on crossing the border visit the “Know Before You Go” section at www.cbp.gov/travel.

Participate in the Nexus program can also decrease wait times at the border, customs officials said. Nexus allows pre-screened, low-risk travelers to proceed with little or no delay into the United States and Canada.

Application forms are available at www.cbsa-asfc.gc.ca and www.cbp.gov. For more information call 866-NEXUS 26.

Information on document requirements and prohibited items is available at www.GetYouHome.gov and www.cbsa-asfc.gc.ca/publications/pub/bsf5056-eng.html.

A downloadable checklist is also available at www.cbp.gov/linkhandler/cgov/travel/id_visa/kbyg/kbyg_travel_smart_checklist.ctt/kbyg_travel_smart_checklist.pdf.