Not only did the I-19 East Frontage Road have a 1.5-mile gap in it, between the Canoa Road and Continental Road interchanges, but the existing road was 30 years old and did not meet Arizona Department of Transportation (ADOT) standards. The two-way frontage road did not have shoulders for disabled vehicles. The I-19 northbound ramp at the Continental Road interchange was so close to the frontage road that there was no room for traffic signals. As a consequence of the less-than-ideal situation, the Continental Road interchange operated with significant delays.