Spice Road

The Spice Road, also known as the Incense Road, was a Camel Caravans route in the Ancient World that ran from Timna in the Yemen to Gaza on the Mediterranean Sea.
Incense came from trees on southern Arabia.

The Incense Road started from Timna on the Yemen Coast, then ran parallel to the Red Sea coast, about 100 miles (160km) inland, until it reached Gaza on the Mediterranean Sea.
The Incense came from trees in southern Arabia and the other Goods were also carried from India, the East and from Ethiopia and Africa. The Route was mainly controlled by the Nabataean Kingdom

The Spice Road ran from Arabia to the Mediterranean through present day Jordan. It was controlled by the Arab Empire of the Nabataean Kingdom which peaked between 168 BCE and 106 CE
Pliny the Elder described Petra as the Capital of the Nabatean Kingdom.
Trajan annexed the Kingdom to the Roman Empire in 106 CE.

Strabo described the great Camel Caravans on the Route as being organised like a huge army.
Pliny the Elder (23-79 CE) described the Route between Shabwa and Gaza, as being divided into 65 stages with 65 halts for the Camels, covering 2,437 Roman miles.
Pliny says the Route took 62 days to complete.
Pliny states each camel caravan had a different fixed Itinerary leading to Egypt, Mesopotamia and Syria, from which it was a criminal offense to deviate.
Each stage was about 20-25 miles (32-40km) in length, and each resting place was either a city or an oasis.
The Route ran parallel to the Red Sea coast, 100 miles inland, with the possible exception of Jeddah.

Pliny, in Natural History 12.65, wrote that at each waystation merchants had to pay for fodder, water, accommodation and tolls.
The total cost was 688 Denarii per dromedary.
Finally, on reaching a Roman Port on the Mediterranean, they had to pay taxes to Roman Tax officials.